No schedule line category could be determined during quantity adjustment

What causes this issue?

When adjusting the quantities in a sales scheduling agreement, the
system could not find an appropriate schedule line category relevant to
MRP and delivery.

System Response

The system does not allow further editing of the document.
IF &[SWITCH]S4H_DOCU_ON_PREMISE& = 'X'.

How to fix this error?

When assigning the schedule line categories in Customizing, make sure
that the appropriate schedule line categories are maintained for the
relevant combination of item category &V1& and MRP type &V2& for the
material.
Maintain at least four schedule line categories for which the following
applies:
First schedule line category
Relevance for MRP and delivery, if necessary at all
Another alternative schedule line category
Relevance for MRP; no relevance for delivery
Another alternative schedule line category
Relevance for delivery; no relevance for MRP
Another alternative schedule line category
Neither relevance for delivery nor relevance for MRP
When maintaining the schedule line categories, it is recommended that
the availability check is not activated for the categories mentioned
above.
DEFINE &ANLEGEOBJEKT& = 'schedule line categories'
INCLUDE 'NA_CREATE_CHANGE' OBJECT DOKU ID TX LANGUAGE E
IF &DEVICE&='SCREEN'
<DS>
<DS:TRAN.VOV5>
Proceed
</>
</>
ENDIF
ENDIF.

Error message extract from SAP system. Copyright SAP SE.