A stray line in the Dynamic Lighting layer that i cant touch nor remove exists. How to remove?

For some reason, a stray line of red is located in one of my corridors on one of my maps. I cant manipulate the line, nor remove it in any way. Can someone help?

Hello Noel, I am sorry to hear that you have encountered this issue with a random line on one of your layers. To rule out potential issues,  please carefully work through these steps of our guide to   Solving Technical Issues : Step 1: Make sure to use the right browser Please check if these issues persist when using both Chrome  and  Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20 Please disable  all  add-ons/extensions. Step 3: Clear your cache If none of the above succeeds, please provide us the name of the campaign and thoroughly work through  Step 4 .  (Don't forget the complete Console Log !) Thank you!

Try zooming in using the slider in the upper right and then drawing a selection box through the line. That should select it.