protocol bgp downstream {
    local REDACTED as REDACTED;
    neighbor REDACTED as REDACTED;

    hold time 30;
    keepalive time 60;
}

 0   ;;; Upstream IPv4 transit
     name="bgp0" instance=default remote-address=REDACTED remote-as=REDACTED tcp-md5-key="" nexthop-choice=default multihop=no route-reflect=no hold-time=30s keepalive-time=1m ttl=255 in-filter="" out-filter="" address-families=ip update-source=REDACTED default-originate=never remove-private-as=no as-override=no passive=no use-bfd=no

06:10:33 route,bgp,debug Unsupported capability received, code: 64
06:10:33 route,bgp,debug Unsupported capability received, code: 70
06:10:33 route,bgp,debug Unsupported capability received, code: 71

    graceful restart off;
    enable route refresh off;
    long lived graceful restart off;

Jun 18 09:51:16 router bird: downstream: Connected
Jun 18 09:51:16 router bird: downstream: Sending OPEN(ver=4,as=REDACTED,hold=30,id=5914a2f9)
Jun 18 09:51:16 router bird: downstream: Got OPEN(as=23456,hold=30,id=185.173.132.2)
Jun 18 09:51:16 router bird: downstream: Error: Required capability missing
Jun 18 09:51:16 router bird: downstream: State changed to stop
Jun 18 09:51:16 router bird: downstream: Sending NOTIFICATION(code=2.7)
Jun 18 09:51:16 router bird: downstream: Down

    advertise ipv4 off;

Reading configuration from /etc/bird/bird.conf
/etc/bird/bird.conf:217:2 syntax error, unexpected ADVERTISE