Book invntry balance refers to first count

What causes this issue?

You changed the quantity counted for an item.

System Response

The system accepts this entry, but it simulataneously indicates that
it is the book inventory balance valid at the time of the first count
which is relevant. That is, although the book inventory balance may have
changed as a result of a goods movement, this is irrelevant for the
count, since the count reflects the inventory balance at a specific
time.

How to fix this error?

Only change the value entered during the first count if you want to
correct a typing error. If you have recounted the quantity of the
first count and you obtained a different result, do not change the
existing count, but enter a recount.

Error message extract from SAP system. Copyright SAP SE.