Bug with the Iberian wedding

[Babelfisk1]

I tried and succeded in getting the Iberian wedding event to fire as Castille

Then aragon accepted the union but the characters didnt marry, since they were too closely related..

The event should not be able to fire when the characters cannot marry, or it should allow them to marry despite their familial relationship.

Alternatively i feel like it should enact the iberian Union if you simply create a normal wedding union among iberan monarchies