[tor-relays] rendezvous on non-OR circuit

What does this error message mean? Is it serious for users and what do I do about it? “ 09:57:16 [WARN] Tried to establish rendezvous on non-OR circuit with purpose Acting as rendevous (pending)” This is on a Ubuntu VPS Tor exit, although exit is limited range IP4 port 80 addresses. Full 443 and others. Exit, Fast, HSDir, Running, Stable, V2Dir, Valid Gerry