Constraint conflicts aren't errors, they are you giving conflicting orders for placement of stuff and the software not knowing which order to follow.
That part is right where you told it to be without issue.
If you had made the parts a contact set, then it might throw a constraint conflict. but without some kind of direction to know that something is important, it is just software doing what you told it to.
If you want to check for interferences use the Analyse Interference tool, it would have pointed you right at this.
