PUT API response is ambiguous and does not send a ValidationError as expected

[aleene]

What

The Swagger documentation for the Put API, specifies a ValidationError. However I receive another json.

Steps to reproduce the behaviour:

use the put API to update a tag, but forget to change the version number.

Expected behaviour

I expect to receive a Validation Error json and not {"detail":"next version must be equal to 2, was 1"}.

Part of

• 🎯 What can I work on ? (Folksonomy Engine) #70