Disconnecting Fitbit HELP

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Does anybody know if all previous "Fitbit calorie adjustments" will be deleted if I disconnect my Fitbit app from MFP app??
I get confussed by the whole calorie adjustments like whether or not I should add excercises if the calories have already been accounted for. And sometimes I'm not sure if calories burned from excercises like zumba or playing Wii Fit are getting calculated correctly on my Fitbit so I just think I'd be easier to keep up with if I add everything separately on each app but I'm afraid that the calorie adjustments from the last couple days will get deleted. I know it probably doesn't really matter but it would definitely bother me..
Please help!