Oh thanks @yuhuisg. Appreciate your reply .
We have the full list of CBAA stations that should fall within the 'CBAA provider group' directly from CBAA.
We are trying to match their list so it is correct for these stations with what is in 'CBAA provider group' in AA.
I think if I cannot change / edit / amend the 'provider group' set up already in CBAA, my only option is to create a bespoke segment with the correct stations from the CBAA list, then use that as our official "CBAA group". Thanks again.