Detailed data for port '&' of type '&' does not exist

What causes this issue?

Port &v1& does exist in the main table for ports, but not in the detail
table for ports of this type. This suggests a database inconsistency (a
table may have been changed circumventing the interface or API).

System Response

Port considered not to exist.

How to fix this error?

Please delete this port and create it again.

Error message extract from SAP system. Copyright SAP SE.