Hi Rajesh
Check the below link it may helps you
My suggesting you can enter the opening balance through inventory opening balance not the way of Journal Entry.
Opening Balance offset a/c works like this.
for Asset A/c
Asset A/c Dr 100000
Opening Balance A/c Cr 100000
for Liability A/c Cr 100000
Opening Balance Offset A/c Dr 100000
So Opening Balance offset account should be zero
I hope this would be clear to you
With Regards
Balaji Sampath