How to Retain Existing Reference Number for Revisions While Generating New Numbers for Variants?

Each time a new project is created, Workfront generates a new reference/form number. However, our business process requires different behavior based on project type:

• Revisions: Should retain the original form/reference number from the previous project/version
  • Example: XX-1A-XX
• Variants: Should generate a new reference number using the same base identifier, but increment the alphabetical suffix sequentially
  • Example progression: XX-1A-XX → XX-1B-XX → XX-1C-XX
  • The core “XX” values remain the same; only the revision/variant letter changes based on the number of versions created

Has anyone implemented a similar setup in Adobe Workfront?

1. How are you handling reference number retention for revisions?
2. What is the best practice for preserving prior reference numbers while allowing variants to create new ones?