"wrong creation SCN - control file expects initial plugged-in datafile"
*Cause: When a tablespace is plugged into a database, the tablespace is
initially read-only. Oracle converts the header of the
plugged-in datafiles (assign them a new creation SCN) when
the tablespace is first made read-write. This error occurs
when the creation SCN in the file header is different from the
creation SCN in the control file, possibly because this is the
*Action: Either restore the initial version of the plugged-in datafile, or
continue database recovery, which will recover the control file.