After install taxonomy_unique, we can not change the name/title of terms with the same name field because the constraint from taxonomy_unique checks if the name already exists before auto_entitylabel updates this value.
Any constraint validation will be against the old name value.
The auto_entitylabel seems that update the label on the hook insert/presave so seems to me that any validation on the name field will be ignored.
Maybe it should done in the form submit/validation instead on the hook presave/insert.
A good solution could be using entity builders, which is a function called before validation https://git.drupalcode.org/project/drupal/-/blob/2e7b6ca227f23820be4638d...
Needs review
3.0
Code
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