MfgPlateMarking Settings object does not have MfgPlateCreation active entity.
A MfgPlateMarking Settings object does not have a MfgPlateCreation active entity through the 'MfgPlateSettingsInput' relation.
Coding or data model errors in an earlier version.
What You Should Do
To delete the object, run the Clean Database custom command (ProgID: SP3DCleanDatabaseCmd.CCheckObj). This command displays a dialog box that lists the objects in error. From the list, you can select the objects and delete them.