EPM - clearing REST apps from line key value

I think I’ve run into an issue with EPM and not being able to clear out (or change) the value setting in the line key template on the Yealink T-46G.

I had Line Key 5 set to REST-Follow Me, but when I try to change it to pretty much anything else, or try to clear it, the Value field never changes, and the generated config file has the setting there.

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