Once the account is restored from full backup, you will see the list of MySQL databases with a list of users
(username)-localhost
(username)-IP
(username)-old-server
(username)-old-IP
You can delete these users - no problem
But if you try deleting any unwanted database, you get error "Duplicate databasename"
(https://ibb.co/rG2t04D)
I am experiencing the same for imported account from cpanel. I get the same error for newly created database in that accont. Have not tested in another user though.
Also unable to add existing dbuser to the newly created database. Though the add user shows successful message!
I am experiencing the same problem when deleting a database from Centos Panel's Cpanel user
let us know the solution asap on this