It looks like it logs smart card identity data:
http://rpmfind.net/linux/RPM/opensus...34.1.i586.html
My guess, based on the above link and a general knowledge of how these sorts of things work, is that some users might have to have their coolkey credentials reestablished.
It's also possible that, if some persons have access to the server from which you got the back up but do NOT have access to the first server, copying the cache over might raise some security holes.
If the same persons have the same access under the same servers, my guess is that things might be okay.
Note that I'm just speculating here and have no specific knowledge of Coolkey.