EDIT
Since you can only have unique term slugs in a taxonomy, you should go for a “mixed taxonomy term” url setup.
You can check this, or this solution that involve creating your own add_rewrite_rules.
EDIT
Since you can only have unique term slugs in a taxonomy, you should go for a “mixed taxonomy term” url setup.
You can check this, or this solution that involve creating your own add_rewrite_rules.