wbmgen fails with error Conflict Identifier: ObjectHistory.xml in Windchill Bulk Migrator

Conflict Identifier: ObjectHistory.xml
Conflict Content   : Listed below a total of 1 conflicts.
	Conflict 1 : Unknown WORM [SERVICEEFFECTIVITY] in reference [SERVICEEFFECTIVITY.OBJECTREFERENCE] on context: com.ptc.wbm.worm.core.Column|1773117761|THELIFECYCLEMANAGED|Reference

INFO  sysgen.SysGen                 - xxx worms found @ <Windchill_Home>/bin/../loadXMLFiles/wbm/worm
INFO  sysgen.SysGen                 - No profiles found
INFO  sysgen.SysGen                 - No source datastore properties found
INFO  sysgen.SysGen                 - No input files found
INFO  sysgen.SysGen                 - 

Available WBM Staging Schema Generation Options
-----------------------------------------------

  1. Start with a new source Windchill database
  2. Generate WBM staging schema for a non Windchill source system
  3. Exit


INFO  sysgen.SysGen                 - You selected optimization: 2
WARN  sysgen.SysGen                 - All optimizations skipped
INFO  sysgen.SysGen                 - com.ptc.wbm.worm.core.SourceCrawler NOT enabled
INFO  sysgen.SysGen                 - Mystery object is NULL
INFO  sysgen.SysGen                 - 0 ignoreable references found @ <Windchill_Home>/Windchill/bin/../loadXMLFiles/wbm/worm
WARN  sysgen.SysGen                 - WORM serialization skipped due to fatal events.
INFO  sysgen.SysGen                 - Elapsed Time: 30 seconds.
ERROR sysgen.SysGen                 - Terminating system generation as 'WORM' reported fatal errors.
ERROR sysgen.SysGen                 - Please correct the problems reported in <Windchill_Home>/Windchill/bin/../wbm/sysgen/20231218053236/reports and execute the tool one more time.
INFO  sysgen.SysGen                 - 
	Session Summary:
		XML Generation: 16 seconds
		Worm Model Generation: 30 seconds
	Total elapsed time: 46 seconds.
	Session State: FAILED <<<< ERROR !!!