My Tag Issues

New to Rekordbox. I have had my rekordbox collection stored on an external usb drive that was originally formated as exFat. After having problems syncing playlists to other usb sticks, I decided it would be best to change my main external usb drive to fat32. I made a complete backup of the contents of my main rekordbox usb drive to another hard drive, then proceeded to format the drive to fat32. After doing that I simply copied all the contents back to the external usb drive. It appears everything is still intact with tracks and custom tags I had created. But I am getting a message that My Tag is synced with another computer. How do I fix this? I don't want to tell it to sync to this computer and risk losing all the custom tags I have spent weeks setting up. This message pops up every time I start rekordbox. I do have a backup just in case something goes wrong. I just want to stop having this My Tag Sync message pop up when I start Rekordbox. Any help on this would be greatly appreciated. I have been using this external usb drive on two different computers without an issue until I changed the drive to Fat32.