Okay, hopefully, the following method will work for you.
- Make sure that FaceTime is shut down.
- Navigate to the "CallHistoryDB" folder. You will find it in your Home Library, in the "Application Support" folder.
- When you get there, delete the three files that you see listed below:
~/Library/Application Support/CallHistoryDB/CallHistory.storedata
~/Library/Application Support/CallHistoryDB/CallHistory.storedata-shm
~/Library/Application Support/CallHistoryDB/CallHistory.storedata-wal
You might be able to delete the fourth file called "com.apple.callhistory.databaseInfo.plist" as well, but I would leave it there for now.
You might want to log out of your account, and then back in again, or even reboot your machine from a cold start, before launching FaceTime again.
Again, please let me know if this is helpful, or if it resolves your issue. Thank you.