ASA syslog error on VPN connection

[Dave151]

We have a remote branch that connects to our main office using a Cisco 877 VPN router connecting to our ASA in the main office.

Every so often I get the following syslog message on the ASA, what does this error indicate?

5 May 27 2008 16:09:49 713904 IP = 88.211.14.214, Received encrypted packet with no matching SA, dropping
3 May 27 2008 16:09:49 713902 Group = 88.211.14.214, IP = 88.211.14.214, Removing peer from correlator table failed, no match!
3 May 27 2008 16:09:49 713902 Group = 88.211.14.214, IP = 88.211.14.214, Removing peer from correlator table failed, no match!
5 May 27 2008 16:09:49 713904 Group = 88.211.14.214, IP = 88.211.14.214, All IPSec SA proposals found unacceptable!3 May 27 2008 16:09:49 713119 Group = 88.211.14.214, IP = 88.211.14.214, PHASE 1 COMPLETED
4 May 27 2008 16:09:49 713903 Group = 88.211.14.214, IP = 88.211.14.214, Freeing previously allocated memory for authorization-dn-attributes