Could it be that this line was created in order to have a vertical border?

>>>Hi everybody,
>>>
>>>I have a report that was created for me by a consultant some years ago. He is no longer in the picture. But what is weird about this report is when I open it in the designer there is a vertical line outside of the report form. By report form I mean the panel where you place report controls. The vertical line extends from the Group Header separator down to the Group Footer separator. I wonder what is this line for? Can I remove it? Is there a reason for it? I have hundreds of other report but I don't see this type of line in any other report.
>>>
>>>Thank you in advance for any suggestions.
>>
>>I saw this several times in my own reports. Seems to be a phantom line, that doesn't really do anything.
>
>Thank you. Hopefully this is all it is. When I have time I will try to recreate the report from scratch to see if the line will go away.