Hello Satish,
You don't have to create IDN manually system will automatically create it using PPF.
Now just search IDN giving ERP ID as reference.
While searching check with both active and inactive mode.
Here you can check and figure out your IDN.
Else you can also try with wildcard search i.e don't give reference document system will fetch all IDN.
Select last IDN document .
Kindly let me know if you face any issues.
BR,
Olet