"“Absolutely not,” Gov. Jesse Ventura said when informed of yet another request from Virginia in 2000. “Why? I mean, we won.”
tl;dr #confederates wanted their treason rag back.
https://www.postbulletin.com/community/flag-captured-from-confederate-soldiers-remains-in-minnesota
Rochester Post BulletinFlag captured from Confederate soldiers remains in MinnesotaThe Confederate flag was taken during the Battle of Gettysburg.