On Wednesday 11 August 2010, Timo Reimann wrote:
[..] It definitely doesn't cause any critical issues to the proper working of SIP-Router. The worst it can do is mess up a call's dialog state when the race condition kicks in. Once the race condition is ruled out, occurrences of the message boil down to broken UAs as Henning pointed out already.
Thanks for the clarification Timo,
i forgot about the state of the race condition in current 3.0 branch.
Henning