I use the endpoint
PUT https://{domain}/t/{slug}/{id}/tags%5B%5D={tag}
to assign tags to topics via the API. However, if I tag a category in which that tag is not allowed ({} is restricted to {categories} or {tag} is not allowed in this {category}), it still returns a 200, despite it not achieving what I want it to. I think it should return a different error code.