CM 1000 - Error Log Help

Getting the below two error messages:

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=14:59:c0:f6:97:40;CMTS-MAC=00:01:5c:8d:ac:54;CM-QOS=1.1;CM-VER=3.1

AND

TEK Invalid - Invalid Key Sequence Number;CM-MAC=14:59:c0:f6:97:40;CMTS-MAC=00:01:5c:8d:ac:54;CM-QOS=1.1;CM-VER=3.1;

Any help in decifering both would be greatly appreciated!