Hi,
I am new to Oracle.
During start up i get the following message:

ORA - 01122 Database file 1 failed verification check
ORA - 01110 : DATA FILE 1 :
"/home/oracle/product/9.0.1/oradata/oralin/system01.dbf"
ORA - 01207 : File is more recent than controlfile - old controlfile

Please let me know how can i fix that.
Thank you.
GK