Change Linux Bcache device type

I have accidentally configured my SSD as a backing device instead of a caching device. Simply trying either one of the following: sudo make-bcache -C /dev/sdb1 sudo make-bcache -C /dev/sdb Gives the errors: Can't open dev /dev/sdb1: Device or resource busy Can't open dev /dev/sdb: Device or resource busy How does one rectify a situation like this?