Routing weld gap issue

Hello All,

What I am stock right now is that I am trying to change some weld gaps on my assembly as required, but I have noticed that when you select the segment you are wanting to edit is some weld gaps are grayed you and I cannot edit them. What could be the reason for this one? Has anyone see this kind of issue?

I am welcome with any suggestions/comments.

Jose Enrico Lalic

SolidworksRouting