No not at all 
The error you see is because there is a premium membership on the facebook account. If you message me the username on your facebook account, i can temporarily remove the premium membership on it so you can merge the accounts.
Bug report - Facebook integration
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Done, thanks!
Hi there,
Do you guys know how to merge my facebook account with the other one?
I'm trying to merge my existing chess.com account with my Facebook chess account and I'm getting this error:
Error 717: This account is already premium. Not able to merge
Am I doing something wrong?