Constellation Migration: Lead conversion flow goes into Broken Process for in-flight/traditional UI cases

Hi Team,

We are migrating our Pega Sales Automation application from Traditional to Constellation.

Current Scenario:

  • In the traditional UI, after creating a Lead, users manually initiate the “Convert Lead” action via Case-wide Local Actions.

  • For the Constellation implementation, we updated the lifecycle so that immediately upon Lead creation, the Lead Conversion assignment/flow opens automatically.

The Issue:

  • For new Leads created directly in Constellation, this automated flow works as expected.

  • For in-flight Leads originally created in the Traditional UI, when opened in Constellation to attempt conversion, the case triggers an error and lands in Broken Process / Flow Problems.

Any guidance or reference to Pega documentation would be greatly appreciated.

Thank you!