you should consider storing an agent's max id in another table. ( the following is MS-SQL compliant.. your flavor may require something slightly different )

you can quickly create this table like so: 

select agent,max(id) 
into agent_id
from tracker group by agent

[download]
and then, before running your insert, run a transactioned query to get and set the max id of an agent 
begin tran
set nocount on
update agent_id
set ID = ID + 1 where Name = 'abc'
select ID from agent_id where Name = 'abc'
commit tran

[download]
this should ensure you have no ID collissions

HTH!

Update: I just read the auto-incremental part of your post... which pretty much squashes this reply. shame on me.

In reply to Re: Re: Issue with simultaneous MySQL actions by LanceDeeply
in thread Issue with simultaneous MySQL actions by Anonymous Monk

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