emqx4.3/changes/ee/fix-14004.en.md

Fix an issue with Cluster Linking where having overlapping topic filters in topics configuration would lead to inconsistent and incomplete cross-cluster message routing. Each topic filter is respected now, but overlapping filters may lead to increased cross-cluster routing complexity.

Breaking changes

Redundant topic filters (e.g. t/1 and t/+) in the topics configuration are now considered invalid. The link will fail to start if such configuration is detected.