Garbage collection of unused dynamic BGP neighbours

Hi Is it possible to garbage collect unused dynamic BGP neighbours? In my environment, these come and go because the dynamic BGP neighbours are themselves quite dynamic (orchestrated containers that get a new IP address every time they are updated or restarted). This causes BIRD to accumulate non-Established «dynbgpN» protocol instances. I would like to get rid of them. Ideally the protocol instance would have vanished by itself the moment it exited the Established state, but since that does not happen, I am hoping there might be a way of deleting them manually (e.g., with birdc)? Tore