In my view this was a VERY BAD change in the database. Now, when using the database to program any scanner you will simply NOT have the mutual aid channel(s) for the agency included on your scanner. It becomes up to you to realize this and then figure out what they are to program them manually.
And it appears these have been removed EVERYWHERE in the database, not just AA county MD. The question is WHY? It must have taken HOURS to do it so there has to be some reason, reasonable or not.