Snort crashing with FATAL ERROR:

[battles]

Snort crashing and will not start with:

Aug 22 15:09:59 snort 27794 Initializing rule chains…
Aug 22 15:09:59 snort 27794 FATAL ERROR: /usr/local/etc/snort/snort_61155_em0/rules/snort.rules(9) Unknown ClassType: not-suspicious

How do you fix/get around this sort of thing?

[battles]

I did a Services / Snort / Update Rules - Force Update and that seems to have fixed it.