How unbind bfd from ipv4 socket

Hello, All! I have two bird2.0.7 process run in same Linux system: bird bird6 (copy of sbin/bird) It used two different config files. In each config describes protocol bfd But I need that process “bird” unbind own bfd from v6 address, and process “bird6” - from v4 address (conflict). How do it? -- *-- * *-- С Уважением*