After upgrade, change tasks are not getting copied over when copying a change
London Patch 3
If the 'Copy Change' UI Action is customized and therefore skipped during upgrade, than non-OOB code may cause issues. Please revert this UI Action to OOB.
1. Revert the "Copy change" UI Action to the out of box version by importing attached OOTB UI Action file into the customer's instance
1. Add versions related list to the UI action
2. Check for the "System upgrades".
3. Right click on the version and click on 'Revert to this version'.