Hi Aditya,
There is no solution to this issue. You have to maintain dummy entry like "N/A-Not applicable" or anything for this vendor in J1ID if you want to do "MIGO with Excise entry" or J1IEX.
You can bypass this error in MIGO by selecting "No Excise entry" in Excise Tab.
Refer the notes 1817788 for understanding. SAP suggests solution for Import Vendors through this note.
http://service.sap.com/sap/support/notes/1817788
Regards
Binoy
