firebird2.5 - Code First Migration for Firebird 2.5 -

i have startup project on asp.net mvc 5. want use code first firebird 2.5.

after enabled migrations , after added first migration, try update database:

add-migration test update-database 

but error:

the name 'fk_aspnetuserroles_aspnetroles_roleid' longer firebird's 31 characters limit object names.

how can change name fk_aspnetuserroles_aspnetroles_roleid shorter?