The 'Hosted' flag for class type: ID={0} is set to '{1}'. This does not match the 'Hosted' flag for its non-abstract base ...

The 'Hosted' flag for class type: [ID={0}] is set to '{1}'. This does not match the 'Hosted' flag for its non-abstract base type: [ID={2}] which is set to {3}. Hosted flag cannot be changed when deriving from a non-abstract type.