We had an incident where we lost a tag for tier 1 data when one of our admins deleted the tag instead of simply removing it from a dataset.

When you click on the sidebar and the tag, there is a panel from top right where you can delete the tag. Doing so deletes the actual tag and deletes it from every entity with that tag. The intention was just to remove the tag from one entity, not delete the tag.

The pop-up from side-panel delete asks "Do you want to remove this tag?" which could add to confusion (remove/delete terminology). There should at least be a clearer message such as the one in 'Manage tags' when you click delete tag stating the importance and how it could remove the tag from every entity:

"Are you sure you want to delete this tag? This action cannot be undone."

Or there should not be an option to delete tag that easily from an entity sidepanel