Enter a technical category for this partner role.

What causes this issue?

No technical category is entered for the current partner role.

System Response

System cannot continue until a value is entered in this field.

How to fix this error?

Enter a technical category for the current partner role. The technical
category is the code that determines the type of partner that can be
defined for the current partner role.

How can this happen?

You wish to create a partner role which references a business partner
which is defined in the system as a customer with account group
'general customer'. Enter the partner role technical category 'G1' to
indicate that the business partner is a 'customer' object belonging to
account group 'General customer'.

Error message extract from SAP system. Copyright SAP SE.