How Released BPA Amount is Unreleased from PO

Summary:

What is the expected behaviour of the released amount in the event that the purchase order is closed / finally closed?

Lets say we have a PO of value £10k raised against an agreement with value of £100k. The released amount will be £10k.

Lets suppose £8k is spent on the purchase order, and then it is finally closed.

Does the unspent £2k get released back to the agreement, so that the released amount is then £8k?

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