Oracle Solution for Error ora-19653

ORA-19653: cannot switch to older file incarnation

What triggered the Error:

ITCHTOCOPY was called with a datafile copy for a datafile that was dropped prior to the time this control file was backed up.

What should we do to fix it:

store and mount an earlier control file. It is acceptable to use a control file that was backed up prior to the creation of the specified datafile.