Changes not possible at present because item is in quality inspection.

What causes this issue?

The required change cannot be carried out at the moment, since the
corresponding <DS:GLOS.inspection_lot>inspection lot</> &v1& &v2&
is in quality inspection.
The message of quality inspection is:
&v3& &v4&
Special note:
Items with batch split cannot be changed anymore after the quality
inspection has been completed.

How to fix this error?

Possibly try to carry out the change at a later point in time.

Error message extract from SAP system. Copyright SAP SE.