dg error

 startup force;
ORACLE instance started.

Total System Global Area 1068937216 bytes
Fixed Size                  2220200 bytes
Variable Size             624955224 bytes
Database Buffers          436207616 bytes
Redo Buffers                5554176 bytes
Database mounted.
ORA-10458: standby database requires recovery
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '/data/DBData/oradata/dadifilm/system01.dbf'