ORA-19735: 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 converted datafile
Action: Either restore the initial version of the plugged-in datafile, or continue database recovery, which will recover the control file
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