<human>: A short description of our relationship: "Carl" and I have been friends since high school.  We're not very close now, other than some sporadic texts back and forth. However, we share a friend group, and I am very close with several of them.

I got engaged last August to the love of my life, and we set our Wedding date in October of last year. 

My friend got engaged a few months ago, and unknowingly scheduled his wedding the day after mine. He found this out the day after he announced the engagement/wedding date. 

He has continued to schedule things (rehearsal dinner, bachelor party, etc) without any regard to me. I have already had these things scheduled, and while the bachelor party isn't a problem, the rehearsal dinner is, as it's set for the same day of our wedding.  Everyone that is going to be in his wedding party, is invited to our wedding, and one of them is even in my wedding party.

I'm not upset about the fact he scheduled his wedding the day after mine.  It really sucks, but he didn't do it on purpose, as I genuinely don't think he knew.  I also have never met his fiancee. I am however upset about the fact that he continued to schedule things with no regard to our plans.  How can I diplomatically resolve things without causing drama?

Can you give me a shortened version of the text?
<bot>: Friend unknowingly scheduled wedding the day after mine, after discovering this, he continues to schedule his wedding activities with no regard to my already made plans. How can I manage this situation?