ID:23777 Can't remove incompatible database files from project

CAUSE: The Quartus Prime software cannot remove one or more incompatible database file(s) from the project because you do not have proper read or write permission for the database file(s).

ACTION: Click OK to close the message dialog box. 1) View the messages for a list of the file or files (with extensions .rdb, .hdb, .cdb, or .tdb) that cannot be removed. 2) Make sure you have proper read or write permission for the database file(s) listed in the Messages window.