Duplicate entry error!!!!

[Stood]

Hi all of you,
My application stores large volumes of property data using MySQL 5.0, MySQL.Net and stored procedures. But, I get the following error whenever 2 or more people are entering data:

#23000 Duplicate entry '<some number>' for key 1

The primary key is set to auto-increment. Has anyone experienced this before?
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[inder]

Try to do a
select max(auto_inc_col) from tablename

Usually reaching the max value of the datatype, mysql may truncate to the max value and you got a duplicate key error. -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --