Thank you Brahmankar,
We ahevobserved following error while releasing the process order , hence we are not able to create/release the order to test in Quality system.
As you guided, we went through MB51, we found batch details for both materials. Here Batches found to be same for Both the material documents. It can also be seen that Movement type 101, 261 and 321 for both the materials agianst their respective material documents.
Still we have confusion on batch how the same batch gets assigned to another material.
Please help us.