Hi Madhu,
For the first issue, the reason why message 06076 is raised is that PR quantity(item 10) is already equal to the quantity in its follow-on PO. So when you convert this PR to PO again, the message will be poped up which is correct.
I suggest you check if this PR is already having follow-on PO which has equal quantity. Then the error is correct.
This message error 06076 is a standard functionality to inform that the
quantity is exceeded.
You can change this message to a warning message in customzing
transaction SPRO.
Transaction: SPRO -> IMG
-> Material Management
-> Purchasing
-> Environment data
-> Define Attributes of System Messages
-> System messages
Best regards,
Ivy