FRM-41390: Cannot set REQUIRED Property of subordinate mirror item %s.%s.
Cause: Application design error. A SET_ITEM_PROPERTY or SET_ITEM_INSTANCE_PROPERTY Built-in attempted to set the Required Property of a subordinate mirror item. The Required Property will be obtained from the master mirror item (the item specified by the Synchronize With Item Property).
Action: Set the Required Property of the master mirror item.
Trigger: ON-ERROR