BarLine Spamming Glitch

After the last measure of my piece, many random barlines are streaked across the remainder of the page and into the gray areas behind the page. They appeared over the course of the last couple hours. I do not know where they came from and I want them gone ASAP. There doesn't seem to be a print preview feature, so I am unable to see whether or not it would affect a printed copy. Thank you for your time and hope to hear back soon.