The mapping of CLR type to EDM type is ambiguous with EF 6 & 5?

Question

Please any one can help me to fix this error?

Schema specified is not valid. Errors:

The mapping of CLR type to EDM type is ambiguous because mult

Answer 1

I got the error above because for both connection strings, I had the same value for metadata specified in my main project's config file, like below:

I ended up copying the correct connection string from the EntitiesB's project's config file.