To edit an existing tag, go to Tags in your user's dropdown menu. All of the tags in your bot will be displayed in a tree view. Select the tag you want to edit and click on the three dots. Select the Edit option, which is represented by a pencil icon.
You can change the name of the tag or move it to another one. To do this, simply click the "Move tag to" checkbox. This will enable the option to write the name of the main tag (already created) to which you want to move the selected tag.
Make all necessary adjustments and save the changes.