- Search for a rule (for instance "squid:S2204") in the Rules page, and add the Tag facet
- Add a tag (for instance "confusing") on this rule
- Reload the page, the tag "confusing" appears in the Tag facet
- Stop the server
- Delete data/es folder
- Restart the server
- The tag "confusing" does not appear anymore in the Tag facet
Update the rule, by adding/removing a tag for instance.