Duplicate entry '2147483647' for key 1

Question

Strange problem I can\'t seem to get my head around. I have a table in a MySQL database with the following structure...

    CREATE TABLE IF NOT EXISTS `tblb         


        

Answer 1

signed and unsigned issue

alter table tblbaseprices
modify column site_id int(10) unsigned NOT NULL;

reference - http://dev.mysql.com/doc/refman/5.0/en/numeric-type-overview.html

• make sure unsigned for foreign key (in this case could be the site_id)
• it could be caused by trigger,
• there is no int(11), the max it can go is int(10)
• there is no need to allow negative value for ID
• to be consistently using same data type for primary key