Qty balances are not sufficient in the register

Hello All,

I had made good receipt the 100 nos with movt type 103 for the project part ( with WBS element) Out of 100 no & after inspection i did use 105 movt type.

The rg23part 1 register updated with 100 nos. But now i found that out 100 piece there are 30 piesce are rejected. So i am trying to do return delivery but system giving me error that Qty balances are not sufficient in the register.

How can i move fruther?

Thanks in advance

shailesh