Diffs in phys. inv. doc. & posted with m. doc. &

What causes this issue?

On the basis of material document &V2&, the system has posted the
differences for physical inventory document &V1&.
The physical inventory process has now been completed for this <GL>
<GL:physical_inventory_document>physical inventory document</>.
On the basis of the <GL><GL:material_document>material document</>
adjustment postings will be made in respect of the differences, and
the book inventory balances will be corrected.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.