Require Partition IDs to end with letters like H20-003-A, H20-003-B and so on

Technical Questions and Answers
1

I tried to achieve this by changing the ID server format value for AnalysisRequestPartition to {parent_ar_id}-{alpha:1a} in the setup UI, but that led to errors while creating test partitions. Values like {parent_ar_id}-{alpha:2a3d} work however.
Are solely alphabetic id endings possible or would that require a change to code in idserver.
Thanks.