Where does Android store fingerprint data?
try removing these files also

/data/system/users/0/fpdata/user.db
/data/system/users/0/settings_fingerprint.xml


Instead of removing files, appending the filenames with some random extension would be better. So, if anything goes wrong we can revert the changes. 
eg: user.db -> user.db.xyz or xyx_user.db

I faced the same error too and this worked for me.