"data file does not match dictionary - probably old incarnation"
*Cause: When comparing the control file with the data dictionary after
a CREATE CONTROLFILE or OPEN RESETLOGS, it was noted that this
datafile was inconsistent with the dictionary. Most likely the
file is a backup of a file that was dropped from the database,
and the same file number was reused for a new file. It may also
be that an incomplete recovery stopped at a time when this file
number was used for another datafile.
*Action: Do a CREATE CONTROLFILE with the correct file or none at all.