Help with getting rid of unwanted stave.

While inputting notes in galley view and then switching back to page view there appeared a stave that has no connection to the staves I’m using and I can’t get rid of it. It does not show in galley view and I have no idea where it came from. Please see pic.

looks like you have hide empty staves active… maybe it becomes clearer what happens if you temporarily switch HES off… ?

Thanks fratveno. While that did not directly lead to a fix it helped me to find one.