duplicate rig problems

In duplicating a rig I’ve obviously duplicated the keyframes as well. But I can’t select just one rig’s keyframes in the NLA Editor. How would I separate the keyframes of a duplicated rig in the NLA editor? When I try to select the keyframes of one rig (in the NLA editor) it automatically selects the keyframes from the original, too.

btw - my apologies if I posted this in the wrong forum.

Problem solved. Apparently this has been reoccurring issue.