Attributes should not be used when determing if a credit is a duplicate entry.

This may be a tricky subject when considering that writers don't have an "occupation" field and the attribute does distinguish the credit, but so does the order number. All too often, I see duplicate credits where one has an attribute and the other doesn't but they are actual duplications. For example, this credit:

There is nothing unique about these two credits and whichever one was added second should have been rejected.