'&2' &1 not maintained for the '&4' &3

What causes this issue?

You attempted to enter the &V1& "&V2&" for the &V3& "&V4&". The &V1& "
&V2&" is not maintained for the relevant goods direction or not
maintained at all for &V3& "&V4&" in the Foreign Trade Implementation
Guide (IMG) object 'Define commodity codes / import code numbers by
country'.
The following can be specified in the field <LS>Addit. information</>
of the above IMG object:
' ' - Entry valid for goods dispatch/export and inbound
transport/import
'1' - Inbound transport/import
'2' - Goods dispatch/export

System Response

The system does not allow this entry.

How can this happen?

You have defined the commodity code '01011990' and provided additional
information '2' in IMG (valid only for the goods direction goods
dispatch/export).
These commoditiy codes now attempt to assign an MM purchase order
(goods direction: inbound transport/import).
The system would not allow this entry, since the commodity code is only
valid for the goods direction goods dispatch/export.

Error message extract from SAP system. Copyright SAP SE.