TWO MASTER AND ONE DETAIL TABLE

HI,
I HAVE TWO SEPARATE MASTER TABLE WITH SAME DETAILS I MADE ONE DETAIL TABLE REFERENCES BOTH OF THE MASTER TABLES(BOTH MASTER HAVE SAME PRIMARY COLUMN NAME) , BUT WHEN INSERT RECORD IN DETAIL IT GIVES ME ERROR THAT PARENT KEY NOT FOUND(ALTOUGH I HAVE INSERTED MASTER DATA IN ONE MASTER TABLE BUT NOT THE SECOND ONE AND IT'S NOT POSSIBLE TO INSERT SAME DATA IN SECOND MASTER TABLE), WHAT I WANT TO ASK THAT HOW IT'S POSSIBLE TO USE SAME DETAIL TABLE WITH DIFFERENT MASTER TABLES. STRUCTURE OF BOTH OF THE TABLES ARE BELOW.
MASTER ONE
SQL> DESC INCIDENT
Name
REF_NO
INC_TYPE_CODE
DISTRICT_CODE
KV33
KV11
INC_DATE
EMERGENCY
TRIP
CAUSE_TYPE_CODE
SUB_CAUSE
INC_DESC
REASON
OPER_SEQ
REM_RECOM
CON_COMP_CODE
CTRL_ENG_APP
DELAY_OCCURED
DELAY_REASON
SECOND MASTER
SQL> DESC SWITCHING
Name
REF_NO
INC_TYPE_CODE
JOB_CODE
DISTRICT_CODE
KV33
KV11
CON_COMP_CODE
INC_DATE
INT_NOTICE_ISSUE
INTERRUPTION
REM_RECOM
CTRL_ENG_APP
WORK_DESC
DETAIL TABLE
SQL> DESC INTERP_DETAIL
Name
REF_NO
INC_TYPE_CODE
FEEDER_CODE
VOL_LEVEL
START_DT_TIME
GRID_CODE
END_DT_TIME
LOAD_AMP
LOAD_MW
LOSS_MWHR
THANKS IN ADVANCE.
KHAWAR

Hi,
When you establish the relations using the references, then oracle will look for the parent key in both the parent tables. Either you need to remove the foreign keys or change your db design to add one more table and have one-one parent child relationships.
HTH
Regards,
Badri.

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