Another solution:
1. Open your table in design mode.
2. Delete the autonumber field.
3. Rename your table (e.g. table_old)
3. Delete your records (make sure this is your intended purpose--to restart autonumber field to zero and not re-sequencing from 1 to number of records).
4. Create a make-table query.
5. Use the current table (table_old) and assign the original name of your table as your target file created...