Basic type & could not be converted

What causes this issue?

You have entered a port in the partner profile that uses the control
record in a release prior to 4.0. In this control record, the field for
the basic type is only 8 characters long.
There must therefore be a conversion of the long name &v1& into a name
with a maximum of 8 characters.
However, no conversion could not be found in the relevant table.

System Response

Outbound processing cannot process this combination correctly.

How to fix this error?

Create a <DS:TRAN.WE70>conversion entry</> or use another port version.

Error message extract from SAP system. Copyright SAP SE.