Xcode6:Embedded binary is not signed with the same certificate as the parent app

Question

After I add Today App Extension Target,I become impossible to compile project. below is error:

error: Embedded binary is not signed with the same certificate as the parent app. Verify the embedded binary target's code sign settings match the parent app's. 

Embedded Binary Signing Certificate: iPhone Developer: (Developer name) (number)

Parent App Signing Certificate: iPhone Developer: (Developer name) (number)

but Embedded binary certificate and parent app's cerificate are the same. So I'm confusing now...

Answer 1

I had to select my app under 'Targets', then go to the 'Capabilities' tab and click 'Fix Issues' under the 'App Groups' section

Answer 2

I had discrepancies under Code Signing. My Extension and Main app had different certificates selected. Once I set both to use distribution it worked fine.