Comments on: MySQL Error: 1062 Duplicate entry ’0′ for key 1

By: Mallikarjun Anehosur

Mallikarjun Anehosur — Fri, 30 Sep 2011 07:01:54 +0000

Got the solution by going through this blog in an minute …
error: 1062 was fixed by changing the field value to auto_increment ..could some one please give me this fix details ,why auto_increment …in my case the filed was primary key with int type ,so why the auto_increment.

By: شات حائل

شات حائل — Wed, 24 Aug 2011 01:38:14 +0000

thanks for sole

By: mamta

mamta — Sat, 23 Apr 2011 15:36:01 +0000

thanks a lot i ws really fix with this error and i tried the suggestion posted here as set the id for bigint and i got my solution.

By: badr

badr — Thu, 24 Feb 2011 01:03:09 +0000

i got the problem. just edit the id field to auto-increment fixed the problem.thnQ 4 the post.

By: Tango

Tango — Fri, 28 Jan 2011 09:20:47 +0000

Thanks for that solution.
It fixed the problem…

By: vinuthomas

vinuthomas — Mon, 26 Jul 2010 11:07:29 +0000

What I meant was, if you're using for example, an INT field, make sure that the maximum value of an int (2147483647) hasn't been reached, or 4294967295 for unsigned INT. If the value in the field has reached the maximum the field can support, it'll reset back to 0

By: Fafff

Fafff — Fri, 23 Jul 2010 19:59:27 +0000

check if your autoincrement field has maxed the datatype for that field.
(what this mean?i don't understand it)

By: Botnix

Botnix — Tue, 20 Apr 2010 19:55:24 +0000

I also solved this error by editing the id field to auto increment, in phpmyadmin there is a check box A_I which can be checked to make sure the id increments.

By: dunghoangit

dunghoangit — Thu, 04 Feb 2010 02:15:54 +0000

try this

REPAIR TABLE your_tbl_error QUICK ;

By: Md. Iqbal Hosan

Md. Iqbal Hosan — Tue, 10 Mar 2009 13:01:31 +0000

i got the problem. just edit the id field to auto-increment fixed the problem.thnQ 4 the post.

By: Joe

Joe — Wed, 21 Jan 2009 03:13:08 +0000

Thanks for posting this — I was really puzzled with this error. I changed the data type to BIGINT and reloaded the data and it worked. -Joe

By: Ajay

Ajay — Tue, 23 Dec 2008 11:36:01 +0000

Hi,
I found your site very helpful. While inserting data into a table I again and again got this error “Duplicate entry ‘0′ for key 1″ and I was surprised where the error is ? When I searched this problem on google, I found solution on your site and fixed the error within seconds.
Thanks a lot for posting solutions.

By: Darren

Darren — Sun, 30 Nov 2008 18:54:19 +0000

I had the same problem when using the INSERT function to enter data into an already populated table, I just had to set the primary key as Id, and set it to auto_increment,

Another reason why this could happen is the data type, check if you’re using TINYINT or INT

By: Tony

Tony — Thu, 07 Aug 2008 15:15:43 +0000

I have the same problem, out of the blue got this error”
uplicate entry ’4853′ for key 1
and I am using “int” as the data type. changing it to bigint may resolve things by resetting the autoincrement for the time being, but I expect it will surface again sometime. There is some other cause for this

Also, it seems not a good idea to use bigint because extra disk space use ref: http://ronaldbradford.com/blog/bigint-v-int-is-there-a-big-deal-2008-07-18/

By: vinu

vinu — Fri, 11 Jul 2008 18:33:27 +0000

Thanks for pointing that out Afrasyab. So this situation could happen when the auto-increment count goes wrong for some reason.

By: Afrasyab Bashir

Afrasyab Bashir — Thu, 10 Jul 2008 18:42:24 +0000

Above normally means that there already exists an entry in the database that already has the value which autoincrement is trying to initialise with. So if duplicate entry ’0′ is there then probably auto_increment value is trying to initialise with 0. I received the error duplicate entry ’1′ for key 1, which strangely meant that the column already have a value 0 which the auto_increment index was trying to initialise. I had to change this value to the last value then changed the column to cater for auto_increment then re-initalise the counter to the last value and then revert the last value of my column back to it’s beginning value i.e. 0. (am i confusing you?