Mysql duplicate key error code. Sep 25, 2024 · Resync mysql replica in a GTID setup gives error HA_ERR_FOUND_DUPP_KEY with AUTOPOSITION Jul 23, 2024 · MySQL INSERT IGNORE is a variation of the normal INSERT that allows the insertion of records in a database table, but only in case of no duplicate key errors or other constraint violations. Chapter 2 Server Error Message Reference The MySQL server writes some error messages to its error log, and sends others to client programs. After your update, language would have the same entry for both rows, and the rows would no longer be unique. In this guide, we'll explore the reasons behind this This article thoroughly investigates the main reasons for the occurrence of Duplicate Entry errors in SQL databases and other widely used platforms. Please help me understand what the error means and how to… Apr 4, 2023 · The error "duplicate key name" indicates that you must already have created the index. When creating a primary key or unique constraint after loading the data, you can get a “Duplicate entry for key 'PRIMARY'” error. Yet somehow duplicates still creep into the dataset – whether from a legacy migration or periodically during updates from disparate sources. Jun 28, 2025 · Learn how to handle duplicate key errors in Golang and MySQL. email' ERROR 1062 (23000): Duplicate entry 'product-slug' for key 'products. For example, a duplicate key was inserted or a Dec 2, 2013 · MySQL Workbench came up with the following SQL to create a table: CREATE TABLE IF NOT EXISTS `mydb`. 5. If you use REPLACE, MySQL actually does a DELETE followed by an INSERT internally, which has some unexpected side effects: Nov 27, 2020 · If i'm not mistaken, mysql doesn't allow multiple foreign keys with the same name. Apr 4, 2023 · The error "duplicate key name" indicates that you must already have created the index. Sometimes when I perform an INSERT query I get an error because the id value is already used. 4 gamma. When you attempt […] Feb 6, 2013 · -> FOREIGN KEY (`store_id`) REFERENCES `store` (`store_id`) ON DELETE CASCADE ON UPDATE CASCADE ; ERROR 1826 (HY000): Duplicate foreign key constraint name 'test/fk_inventory_film' Each SQL statement executed results in an error code, an SQLSTATE value, and an error message, as described in Section B. then it gave an error stating that there was a duplicate on that index, and then it doesnt allow me to delete the index because there's a foreign key on it. MySQLIntegrityConstraintViolationException: Duplicate entry '22-85' for key 'ID_CONTACT' Dec 31, 2024 · Learn to identify and resolve common MySQL errors. The solution is to populate the column with unique values and then try to create the primary key again. You can find the file in the /etc directory, in my case I have a file name as “my. So, how do I fix this annoying error? Jan 21, 2016 · The data you are trying to insert is already present in the column primary key. ) In general, you should try to avoid using an ON DUPLICATE KEY UPDATE clause on tables with multiple unique indexes. With ON DUPLICATE KEY UPDATE, the affected-rows value per row is 1 if the row is inserted as a new row, 2 if an existing row is updated, and 0 if an existing row is set to its current values. jdbc. exceptions. mysql mysql-workbench error-code mysql-error-1062 edited Jan 31, 2013 at 14:47 asked Jan 31, 2013 at 14:35 FrancescoN Mar 23, 2020 · Solution for MySQL Slave: Duplicate entry So we are going to make changes to the configuration file for the MySQL Slave server. atable; Duplicate entry '174465' for key 'PRIMARY', Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event's master log mysql-bin. 30-community-log]Can't write; duplicate key in table 'd_s_rep' insert statment "does not" include values for id (NOT NULL AUTO_INCREMENT) and t_stamp (NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP). Read on to know the various ways in which the cause of this What is the exact error message? #1062 means duplicate entry violating a primary key constraint for a column -- which boils down to the point that you cannot have two of the same values in the column. Duplicate entry '1' for key 'PRIMARY' To Access My Live Chat Page, On Google, Search for "hows tech developer connect" more Jul 17, 2014 · I had the same problem. Jun 2, 2022 · MySQL error code 121: Duplicate key on write or update This blog post was published more than one year ago and might be outdated! Sep 28, 2023 · To fix the duplicate entry ‘NULL’ error, you need to modify the table structure and remove the duplicate entries or update the ‘NULL’ values. The primary key column is unique and it will not accept the duplicate entry. Then you can investigate the duplicates before deciding what to do with them. May 1, 2020 · Duplicate key error number has changed between 5. Here, we have used the primary key concept as well as the try-and-catch concept in Java to handle that duplicate key exception. As for your 2nd error, what is the DDL (create statement) of your Menu table? Oct 30, 2022 · ON DUPLICATE KEY UPDATE c=c+ 1; Code language: SQL (Structured Query Language) (sql) We have three columns a,b and c, out of which the a is set to UNIQUE and has the value 1 already. Assuming two masters, master1 and master2, data is inserted into master1 at all An error replicating data manifesting as a duplicate primary key error. Plan B: Insert into a table with INDEX, not UNIQUE. 0 and 5. I am getting an Error on Slave as: could not execute Write_rows event on table mydatabasename. Inserting a NULL into a column with a NOT NULL constraint. cnf on the Slave [mysqld] slave-skip-errors=1062 skip-slave-start and restart mysql. Feb 27, 2023 · How to fix MySQL replication when duplicated key problem appears? Ask Question Asked 2 years, 7 months ago Modified 2 years, 7 months ago Aug 10, 2017 · Then, under the hood, mysqld attempted to load data into the table which is already populated and an index that's still populated, thus creating a duplicate key error. Nov 24, 2018 · Posted Error Code 1062 Duplicate Primary Key Karen Ledin November 24, 2018 11:03AM Re: Error Code 1062 Duplicate Primary Key May 23, 2016 · Perhaps you can check out this question and answer: MySQL replication: 'Duplicated entry for PRIMARY key' 1 : Skip all the Duplicate Key errors Simply add this to my. Mar 2, 2024 · One way to fix this issue is to create a composite primary key (one that’s defined across multiple columns). Mar 18, 2014 · If you have two rows in mysql. INSERT 시에 중복 (Duplicate) 키 에러가 난다면… 다음 쿼리를 실행했더니 에러가 난다. These errors are returned from the server side; see Section B. cnf file, you can use the editor of your choice. 12. 3, “INSERT DELAYED Statement”, Inserting into a table requires the INSERT privilege for the table. 3, “Server Error Codes and Messages”. Feb 2, 2024 · Encountering Error 1062 in MySQL can be a common issue when working with databases. You meticulously craft your schema with constraints, keys and indexes to enforce data integrity. user with the same username and hostname except for the capitalisation of the hostname (this is for example possible due to bug 62254 /bug 12917151), mysql_upgrade will cause a duplicate key error and terminate. You understand that CHAR(15) utf8 occupies 45 bytes always for most ROW_FORMATs? Perhaps VARCHAR(15) would be better? (Please don't quote the debunked wives' tale about Feb 14, 2013 · Note 2: OK, this is a complete "twilight zone" moment: so after running the query above with the huge number for id, things started working normally, no more duplicate entry errors. # vim /etc/my. 343746Z 606179825 [Note] Slave SQL for channel '': Could not execute Update_rows event on table May 27, 2012 · ON DUPLICATE KEY UPDATE" - though I think those are MySQL specific and would go against the portability of using PDO, if that's something you're concerned about. log is showing following errors repetitively: 2019-10-18T14:31:46. 18-1 The master's snapshot is created by: mysql&gt; FLUSH TABLES WITH READ LOCK; shell&gt; mysqldump --all-databases --master-data &gt; dbna Nov 13, 2021 · MYSQL Error 1062 Duplicate Entry for Key Primary”, when MySQL notices a DUPLICATE of a segment you are endeavoring to implant. This can cause you problems with foreign keys, and also if you have a small primary key and you constantly replace into it, you can end up with a primary id that's bigger than the limits you set. Sep 5, 2022 · However, there's a seemingly known problem with AUTOINCREMENT fields which causes a "Duplicate entry for key 'PRIMARY'" to which I haven't found good solutions thus far and so asking this question. 000004, end_log_pos 60121977 When encountering the error `1061: Duplicate key name` in a MySQL database, follow these immediate actions: Identify the Duplicate Key Name: Check the query that caused the error to identify the duplicate key name. could not execute Write_rows event on table mydatabasename. Since adminLogin table should be initial first time, When user re-run the program, the Duplicate entry for primary key error occurs. 7. Run the SQL command SHOW CREATE TABLE hrmsemployee. if you change to old_alter_table=1 it works. Feb 24, 2025 · Discover effective solutions to fix MySQL Error Code 1062: Duplicate Entry and ensure smooth database operations with our comprehensive guide. If the data in the source database is valid and there are no any duplicates you should check which collation is used in your MySQL database. Duplicate entry '5452' for key 'device_id' from update device_info set serial_number = '72801516 Or variations such as: ERROR 1062 (23000): Duplicate entry 'example@email. Jun 10, 2023 · I'm facing a "Duplicate entry" error when trying to insert data into a MySQL table, even though the values being inserted are unique and should not violate any constraints. In this case, we will focus on the ‘sales Sep 24, 2013 · I searched through the prior posts but didn't quite find the answer, so here it goes I have this table CREATE TABLE `leags` ( `lid` int(10) NOT NULL AUTO_INCREMENT, `lName` varchar(255 Mar 13, 2017 · I have unique column in mysql database when and duplicate entry occur's it gives Error: ER_DUP_ENTRY: Duplicate entry how to handle the error form nodejs May 22, 2005 · I have a similar problem loading data using version 4. MySQL : Error Code: 1062. Nov 30, 2018 · However, in your case, I suspect the duplicate entry results from trying to create an index with the same name twice. IntegrityError Exception This exception is raised when the relational integrity of the data is affected. ERROR 1022 (23000): Can't write; duplicate key in table 'C:\WINDOWS\SERVIC~1\NETWOR~1\AppData\Local\Temp\#sql65c0_d_10f' Error 1062: Duplicate entry 'John' for key 'name_UNIQUE' I would like to be able to build a data structure that allow me to organize the information in order to return a user friendly message like The first row contains a duplicate value for one of the table's unique keys (column a), but b=b+1 in the UPDATE clause results in a unique key violation for column b; the statement is immediately rejected with an error, and no rows are updated. 1: Understanding Error Code 1062 MySQL Error Code 1062 occurs when you attempt to insert a record into a table, and the operation would result in a duplicate entry for the primary key. Another way to fix it is to change the values so that they’re all unique. Example server-side error messages written to the error log: Mar 29, 2025 · A code snippet for checking mysql errors by code so you can better handle errors such as duplicate entry for key errors 10. Nov 5, 2014 · I have a table with a unique primary key column called id. Then, run START SLAVE; all the duplicate-key errors will get bypassed. e_daily] Unknown database 'mydb' I'm trying to insert a huge list of users to a MySQL database but everytime I try I get the error: #1062 - Duplicate entry '' for key 2 It gives me this because the 2nd column is blank on quite a Do not use MySQL error code 0 because that indicates success rather than an error condition. 5 errors. leavetable in a MySQL client to check what indexes currently exist in the table. Jul 8, 2015 · Plan A: Use INSERT IGNORE in your batched inserts. The command: load data concurrent infile '<filename>' replace into table <tablename> fields escaped by '' lines terminated by '\r'; exits with the error: ERROR 1062 (23000): Duplicate entry '12835265' for key 1 It seems that the replace option is ignored !! (12835265 is the primary key of an already present row) mysql version: 4. If the ON DUPLICATE KEY UPDATE clause is used and a duplicate key causes an UPDATE to be performed instead, the statement requires the UPDATE privilege for the columns to be updated. May 5, 2018 · MySQL Master version: 5. I found some serious data difference in one of our main table and mysqld. When Seconds_Behind_Master gets >to 0, remove those lines and restart mysql. Mar 7, 2020 · I didnt create the index myself, Workbench created the index automatically when i made the foreign key. Mar 28, 2018 · Mysql Slave replication was working fine, but suddenly it has crashed due to duplicate entries error The slave SQL thread stops due to duplicate entries in MySQL DB Jul 16, 2022 · It is similar to ON DUPLICATE KEY UPDATE, but it removes the old entry and replaces it with a new one with a new ID. Oct 12, 2020 · ERROR 1826: Duplicate foreign key constraint name Asked 5 years ago Modified 2 years, 3 months ago Viewed 38k times For the reasons for this, see Section 15. Instead of that error, I would like to alert the user that they need to enter a different value. When the user enters a value that already exists in the table, the MySQL error "Duplicate entry 'entered value' for key 1" is returned. com' for key 'users. mysql. One such error that often perplexes users is Error Code 1062, which specifically points to a duplicate entry problem for the primary key. In general, you should try to avoid using an ON DUPLICATE KEY UPDATE clause on tables with multiple unique indexes. Jan 4, 2012 · What are the reasons for "DUPLICATE KEY" errors in MySQL replication? I am having master-master replication setup. Feb 14, 2009 · Inserting a duplicate key in columns with PRIMARY KEY or UNIQUE constraints. PRIMARY KEY (entity_type, entity_id, deleted, language) Currently, they are unique because you have two entries in the table for language. 1. . May 28, 2005 · creating foreign key throws ERROR 1061 (42000): Duplicate key name error May 20, 2021 · I am trying to update a record in a table and it's throwing the following error: Error Code: 1062. Jun 3, 2018 · Package errors provides functions and variables for handling common MySQL errors. Oct 30, 2012 · What the error actually denotes is that a pending key value is blank. `errors_reports` ( `error_id` INT NOT NULL , `report_short` VARCHAR (15) NOT NULL , PRIMARY KEY (`error_id`, `report_short`) , INDEX `error_id_idx` (`error_id` ASC) , INDEX `report_short_idx` (`report_short` ASC) , CONSTRAINT `error_id` FOREIGN KEY (`error_id` ) REFERENCES `mydb`. May 25, 2018 · MySQL error no 1062 can occur due to buggy web applications, corrupted dump files or replication issues. `errors Nov 11, 2024 · Unlock the secrets of MySQL's `ON DUPLICATE KEY UPDATE`! Discover common pitfalls, expert tips, and avoid costly mistakes in your database operations! Jan 11, 2011 · Description: when using fast alter table, adding a unique key on multiple columns where one of the columns is null can lead to duplicate key errors where none would occur if the unique key was already created at table creation: ERROR 1062 (23000): Duplicate entry '7777-0' for key 'c' How to repeat: import attached file. Nov 1, 2023 · I can create the primary keys but when creating foreign keys I get a Duplicate key on write or update error if I am trying have more than one chiled table linked to a parent table no matter what I try. 2, “Types of Error Values”. Sep 3, 2014 · Because this code runs every time that program starts, I can prevent errors occurs on creating database and creating tables by using IF NOT EXIXTS statement. That way the dup keys do not cause trouble. Sep 15, 2016 · That's why you are getting the duplicate foreign key constraint name when you are trying to execute this: ADD CONSTRAINT `bid_ibfk_3` FOREIGN KEY (`car_id`) REFERENCES `car` (`car_id`) Dec 20, 2014 · How can i catch this Exception : com. The error message typically looks like this: generation of SSL certificates as options related to SSL are specified. 1, causing incompatible change for any applications using it (and it is one of most used error codes): 5. Jul 23, 2025 · MySQL INSERT ON DUPLICATE KEY UPDATE statement is an extension to the INSERT statement, that if the row being inserted already exists in the table, it will perform a UPDATE operation instead. UQ_slug' Description This error occurs when you attempt to insert or update a record with a value that already exists in a field that has a unique constraint. 51 Driver] [mysqld-5. cnf”. I'm getting a 1022 error regarding duplicate keys on create table command. May 8, 2021 · When running next query, I am receiving a duplicate key in table. Inserting a row to a partitioned table, but the values you insert don't map to a partition. I am trying to insert sone fake data into my db in MYSQL but I am getting error code: 1062. This has me very concerned as it stops replication dead, signifies data corruption, and I don't understand the cause. Using ON DUPLICATE KEY UPDATE and still having the error : Duplicate entry It was caused by another column having a unique key index and one row having an empty value in it. (I came to that conclusion because the index definitions themselves are also stored in a table, and the error you get refers to the name of your table as a value for the duplicate key. 2. This tutorial shows you how to use MySQL INSERT ON DUPLICATE KEY UPDATE statement effectively by practical examples. Jul 23, 2025 · Below we have explained this concept with proper examples for both duplicate key violations and successful insertion. Jul 1, 2009 · ifferenza; Duplicate entry '8441-815-999-999-1--1-C00815A0026' for key 'PRIMARY' , Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event's master log This tutorial shows you how to use the MySQL INSERT IGNORE statement to insert rows with valid data into a table while ignoring rows that cause errors. 7 it was running fine from last 1 year but now we are facing issue and found some serious data syncing issue. Oct 19, 2019 · We are running master slave replication on mysql 5. Can someone explain me WTF was MySQL doing to produce this weird behavior? Nov 27, 2011 · [MySQL] [ODBC 3. 2018-10-02T03:20:39. This guide covers typical errors, their causes, and effective solutions, enabling you to troubleshoot MySQL issues efficiently. jdbc4. Can I catch Dec 3, 2016 · We're restoring our slave with a full backup from our master, and getting a bunch of duplicate key errors. Feb 2, 2024 · This error indicates that an attempt to insert or update a record has resulted in a violation of a unique constraint, trying to insert a duplicate key into a table. It introduces the step-by-step ways to get rid of this error. Edit: To more formally answer your question, to me, solution #1 (the defensive programmer) in full usage effectively eliminates the point of the unique constraint in the first place. Mar 27, 2024 · Discover effective methods to fix MySQL Error 1062, including insights into common causes and reasons why this error occurs. atable; Duplicate entry '174465' for key 'PRIMARY', Error_code: 1062 The first row contains a duplicate value for one of the table's unique keys (column a), but b=b+1 in the UPDATE clause results in a unique key violation for column b; the statement is immediately rejected with an error, and no rows are updated. This guide shows you how to fix error 1062 to prevent leaking sensitive user data. Once the slave gets caught up, it does not throw any errors (only when it is behind the m May 5, 2024 · ALTER TABLE `momento_distribution` ADD `id` INT( 11 ) NOT NULL FIRST; ALTER TABLE `momento_distribution` DROP PRIMARY KEY , ADD PRIMARY KEY ( `id` ); Unfortunately, my second query failed with the following error: 1062 - Duplicate entry '0' for key 'PRIMARY' Can someone please point out the issue? May 15, 2024 · Explore the nuances between MySQL's INSERT IGNORE, REPLACE, and ON DUPLICATE KEY UPDATE for handling duplicate data, with code examples and practical advice. Having looked at the query, I can't understand where the duplication is taking place. Handle Duplicate key violations in JDBC To handle duplicate key violations in JDBC. This error signifies that a duplicate entry is being inserted into a table with a unique index or primary key. PRIMARY KEY ( `int_supr_id` ) , CONSTRAINT `fk_parent_id` FOREIGN KEY ( `int_supr_id` ) In the above statement, you can't redefine the index type on a single column. Then save and Dec 11, 2013 · Use "Perror 121" on command line : MySQL error code 121: Duplicate key on write or update At the end of the log, it shows 9 successful operations and 1 failure with only path table visible in the logs. cnf [mysqld] slave-skip-errors=1062 skip-slave-start We have used vim editor to edit the /etc/my. For a list of MySQL error codes, see Server Error Message Reference. The situation: both masters get an INSERT statement into a table that has an AUTOINCREMENT field. 16-1 MySQL Slave version: 5. You have a primary key on the following fields, meaning that when combined they must be unique. if you put the unique index Could you please help me to understand why I'm receiving 'Duplicated entry for PRIMARY key' on a slave server after a full re-sync. 410387Z 768 [ERROR] [MY-010045] [Server] Event Scheduler: [evtuser@localhost][myschema. Basically 'mysqldump' was running almost whole night and then the As database developers, we‘ve all encountered our fair share of duplicate data causing errors in our applications. You can't have two foreign keys named the same thing across the whole query. 1ryv qgocxdk8q nk8x 2c3fmx rzkp rkqsp els1g dbom 7beoi bjhyk