What can be done to get TT revision area to not reopen at old wound site? (photos)

I had a TT 1 year ago. I had a seroma & 2 areas opened on my scar. One area went 6 in. deep; I had to pack it for many months. It left a bad scar and the area was caved in. I went back for a scar revision & the old wound site began to open again. It started small & is getting bigger; the area around it is weak so I think it will still get bigger. It is also draining with intermittent stabbing pains. What can be done so this will heal ok? Is another revision with a new plan in this area needed?

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