Cause: A block with the INSERT_ALLOWED or UPDATE_ALLOWED property set to True must have at least one writable item. You attempted to make the only remaining base table item in the block not writable by setting either the DERIVED_COLUMN or QUERY_ONLY property to True.
Action: Set INSERT_ALLOWED or UPDATE_ALLOWED to False for the block, rather than setting DERIVED_COLUMN or QUERY_ALLOWED to False for each item.
Level: 10
Type: Informative