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SQL> alter database recover managed standby database finish skip standby logfile;
alter database recover managed standby database finish skip standby logfile
*
ERROR at line 1:
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 1: '/oradata/stage/datafile/system_01.dbf'
ORA-01122: database file 1 failed verification check
ORA-01110: data file 1: '/oradata/stage/datafile/system_01.dbf'
ORA-01130: database file version 9.2.0.0.0 incompatible with ORACLE
version 9.2.0.0.0

Звучит почти как "Oracle не совместим с самим Oracle"...