I have a Red English rose potted on my terrace. I am noticing a sideshoot coming just below the bud union. I am attaching a photo of the plant. Please note that this new shoot is just slightly below the union or may be it's a part of it and I am just unable to identify. I have always have had trouble with identifying if it's a sucker on a rose plant or not.
To describe the new shoot- Every leave bunch has 7 leaves, but to be more precise some of the other stems of this rose plant also have 7 leaves. It is bright green as you can see in image. It does have thorns.
Need your experience and suggestions if this is a sucker that needs to be removed.