This is a known bug in JET.
See:
Fixing AutoNumbers when Access assigns negatives or duplicates
at:
http://allenbrowne.com/ser-40.html
The article describes the causes, and how to reset the Seed of the
AutoNumber.
--
Allen Browne - Microsoft MVP. Perth, Western Australia
Tips for Access users -
http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.
"john" <hg*@neckso.comwrote in message
news:31***************************@cache110.multik abel.net...
>A record of a table with an autonumber field was accidentally deleted. From
the backup table I made a new table with only the deleted record. Then with
an add query I added that record to the original table. After that, when
adding a new record, the autonumber continued with the last ID value (from
the add query) + 1 there by overriding already existing records.
Is this WAD?
What should be best to do in such a situation?
Thanks,
john