error in LevelPermission domain class

[simonckenyon]

[WARNING] Property [first] of domain class grails.plugin.nimble.core.LevelPermission has type [grails.plugin.nimble.core.LevelPermission] and doesn't support constraint [minSize]. This constraint will not be checked during validation.

I cannot work out what was the intent of the constraint.

[snimavat]

I dont see this error with 2.5.5, and property 'first is string' which can have minSize constraint