Double required messages for rails 5 belongs_to

[elbzero]

Hello,

I have noticed in rails 5 belongs_to associations are required by default https://blog.bigbinary.com/2016/02/15/rails-5-makes-belong-to-association-required-by-default.html

Schema validations will also add its own validator as well. Because of this it gives a weird error message like this "Owner must exist and Owner can't be blank"

I was hoping that it could be modified to not add the validator if there was already existing validator attached to the field for this use case.