Help with this error message in Siebel 98 :- [INTERSOLV][ODBC Oracle driver][Oracle]ORA-00001: unique constraint (SIEBEL.S_CONTACT_IF_U1) violated

Any help is urgently needed - we have a deadline to meet by the end of the week for data extraction.

Does anyone have any ideas on how to resolve this error ?

[INTERSOLV][ODBC Oracle driver][Oracle]ORA-00001: unique constraint
(SIEBEL.S_CONTACT_IF_U1) violated

I am trying to extract data from Siebel Sales 98 and am using the following IFB file to do this through the Enterprise Integration Manager component in Server Tasks screen.

[Siebel Interface Manager]

      USER NAME = "SADMIN"
      PASSWORD  = "SADMIN"
      PROCESS   = Export All Contacts





[Export All Contacts]

      TYPE = SHELL
      INCLUDE = Export Contacts
     


[Export Contacts]

      TYPE = EXPORT
      BATCH = 200202
      CLEAR INTERFACE TABLE = FALSE
      EXPORT ALL ROWS = FALSE
      EXPORT MATCHES = (FST_NAME like 'B%')
      TABLE = S_CONTACT_IF
      TABLE = S_CONTACT1_IF
      TABLE = S_CONTACT2_IF
      TABLE = S_CONTACT_DTLIF