Can't insert new item in top menu

Hi - a problem that just came up.  I am unable to move the NEW_ITEM block to the active area of the navigation menu builder.  I get a screen error message that says "unable to insert new object" and generates an emailed database error message:

INSERT INTO `TopMenu` ( `Name`, `Type` ) VALUES ( 'NEW ITEM', 'custom' )
Mysql error:
Duplicate entry '0' for key 1

Remarkably similar to the problem I had with the join form builder so I look in the database an sure enough, find NEW_ITEM in there with an ID of zero.  I delete this, but when I try to put the item back in with builder, it just happens again.  Any ideas on this one?

Rob

Hello!

We checked 2 similar cases with your site and found out reason - both table had deleted autoIncremetn for ID fields? Support answered how you can fix this trouble in future but it's very interesting to know for what purposes you changed structures of tables by similar way?

Regard

Leonids,

Thank you for fixing this.  I didn't delete the autoIncrement for ID fields, and I have no idea why this has been happening.   Strangely, my Wordpress application developed a similar problem without my touching it.  My hosting company fixed this and I don't know if the two problems are related or if it is just a coincidence.  I really appreciate your help.

Rob