Federation - Mapping does not work

Two nodes were paired.

Node A exposed one module with 3 text fields - Email, FirstName, LastName.
Node B sees this module and its fields. When I tried to map this fields I got an error - “could generate order expression for FederationModuleMapping: invalid column name: id”.

My module does not have any “id” field.

Could you please suggest what to check?

Thanks.