The mapping of CLR type to EDM type is ambiguous

Question

Schema specified is not valid. Errors:

The mapping of CLR type to EDM type is ambiguous because multiple CLR types match the EDM type 'CmnAddressCity'.

1. Previously found CLR type 'ABS.Models.Sales.CmnAddressCity',
2. newly found CLR type 'ABS.Models.SystemTools.CmnAddressCity'.

Is there any solution?