[AccessD] Autonumbers - Change ID from Number to AutoNumber

Hi Guys,

I have a table with a unique indexed ID with random numbers throughout.
Many  blanks in the sequences.

Some of these IDs are related / cross-referenced to other tables.

Is there  anyway  I can change this ID to an  Autonumber so that future
records get an autoincremented ID?

I  do not want to change the numbers in there  if possible.

Thanks

Max