In TDM Portal Version 220.127.116.11, where generators are using pre-action of truncating a table in database with SQL or Javelin flow are not working. This functionality was working in earlier version 18.104.22.168.
Defect in the version 22.214.171.124.
Release : 4.9.1
Component : CA Test Data Manager
If anyone facing the same issue, please open a support case and request the latest version of TDM Portal which should resolve the issue.