Originally Posted by
Omni
Issue resolved for me, sort of.
The issue with me was that my 93sv plus had the LakeVug3 (older) maps and my new 126sv ultra has a USCoastal+g3 set of maps (newer). In my case I just removed the old 93sv maps because I will no longer be using it. I also had to reset the AC app and delete the older maps and DL the new ones, all other data such as waypoints and tracks are kept (it's in the settings and says "reset app").
It would seem to me that the only way to keep both is to only have 1 AC card for your most used unit but I'm not 100% sure about that. It was mentioned while talking with Garmin.
Good luck!