Sample Type - Ensure unique values for attribute

[dgslos]

Hi,

I'm not sure if it somehow already exists, but searching the documentation did not return a hit. I would like to request a feature that ensures unique values for certain attributes in the sample type template. This would be handy for fields that can contain a specific value only once, e.g. a unique identifier. I think it can be a checkbox similar to the 'required' checkbox.