How to remove a funny looking line from the score editor

Hello. Please look here. i may have done something but there is a funny looking line in my score editor under the notes here marked in red. Can anyone help me figure out what it is and how to remove it?

THank you

You most likely have added a Brillenbass symbol between the first ant the third notes in that bar.
In that case, check Grouping in the extended toolbar then delete the “Grouping” helper if it appears on the score at that position.
Though the position of the second note is not normal. Maybe you have moved that note graphically.

Thank you! It was the grouping. I had “auto-group” selected for those noets and must have changed the note value.