BIRD removing BGP routes from other daemon - FreeBSD

[Cassiano Peixoto]

Hello,

I have a particular scenario where my BGP runs with OpenBGP and I can not
change it right now.

However I want BIRD to use OSPF and BFD. While BIRD works perfectly, better
than OpenOSPF for my scenario, when I start it, it completely removes all
routes installed by OpenBGP.

My kernel context has learn, persist and import:

protocol kernel {
        learn;
        persist;
        scan time 10;
        import all;
        #export all;
        graceful restart on;
}

What should I do to keep BIRD co-operating with other routing daemons?

Thank you.