OPC UA PubSub Configuration Error (PLCN0026): '...': Connection name must be unique.

In the configuration of the OPC UA PubSub communication, multiple connections with the same name are defined. Connections (name and Publisher ID) must be unique within a configuration.

Remedy

Double-click the error message to jump to the affected editor position.
Rename the affected connection(s) in the respective properties editor.

Example