SAP Note 12401 - MB1x : F4 Help for Movement Type and Special Stock

Symptom:

When the user presses F4 Help for the entry fields "movement type"
or "special stock", the system displays a dialog box with a list of
all valid combinations of movement types and special stock indicators.

The system automatically uses the selected combination from the list,
overwriting any existing values for movement type or special stock
indicator.

Cause and prerequisites

This function has been intentionally designed to work this way since
it makes sense to only use valid combinations that are relevant to
the user.

Solution
If the user does not want to use any of the suggested combinations,
he/she can simply select "Cancel" to exit the dialog box.

Key word: F4: BWART/SOBKZ