It let me delete the pair, but now when I query the device group I get the following error
symrdf -g SECMKT11 query
Device group 'SECMKT11' is invalid.
I exported the device group and re-imported it after editing out the devices that no longer need to be in it. It looks like it is working fine. I appreciate the quick response from you and especially the correct answer. Points are on the way.
ah that's right, having non R1 devices on R1 device group essentially invalidated that group. I think running "symld -g <blah> remove DEV005 -force" would have worked too. Glad it worked out for you.