Welcome to Noeman Road rider.
I moved your post into this thread because it's relevant here.
I assume you used one of the methods described on Page 1 here or a similar one to update your primary detail map. It is most likely you have loaded a locked image to your 2720. You don't need to remove the map, you can simply overwrite it with an unlocked image. Use gmapprom.img with the command line from bat file, or gmapsupp.img from MapInstall/MapSource to overwrite it depending on the name you've used for it [probably it's gmapprom].
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