Running out of numbers in NRIV RP_REMIT REM1

Help guru's!!!

We are unable to update 3rd party tables. We are receiving the message from RPURMU00 (3rd party store): "Number xxxxx of number range RP_REMIT REM1 already used. Please check number range. No table update performed."

Our range is 00001 thru 9999 in table NRIV for RP_REMIT 'REM1'. We have hit 99999. Has anyone else experienced this problem and if so, how did you continue with 3rd party updates?

Is it possible to assign a new number range to the Evaluation Run Number?

Your help is appreciated!