In this case, you may be logged in via another Facebook account. Please follow these steps:

On Android devices

Go to Settings >> Account >> Select Facebook account >> Remove Account
Delete game and reinstall, and login to the game via your Facebook account

On iOS devices

Open Facebook app and logout your account
Open Safari browser, go to facebook.com & logout your Facebook account (if you're logging in)
Select Settings >> Facebook >> Select Facebook account >> Delete Account
Open the game, logout and relog via your Facebook account