reset JOB ID

[Paul]

> JOB ID is the printer-name or class-name and a jobid (prtabc-123456)
> Currently our jobid is a 6-digit number. What is the maximum
> of this number and how can I reset this number back to 1, or what happens
> if the maximum is reached?
I know it's well over a million.  the "next" number is stored ind /var/cache/cups/job.cache.  if you cancel all pending jobs and remove that file or set it back to 1 that would re-set it.