Rigify vertex groups mesh deform error So I imported a model into Blender that already has vertex groups and a skeleton. I then imported a metarig and made it the exact same shape as the imported skeleton. I applied the armature modifier and deleted the custom skeleton and then  I made another armature modifier and set the object to the Metarig. The mesh deforms fine. So then I generated a rigify for the model and it worked out fine. However, I went to the DEF bones layer and I saw that the arm and leg bones were subdivided. So I then set armature deform of empty groups to the bones and I renamed the original vertex groups to the arm and legs vertex groups. I then cut the weight paint in half for the subdivided bones manually like so:[![enter image description here][1]][1]



But when I pose the arm, the mesh deforms incorrectly at the armpit:



What should I do to fix the mesh deform problem? Auto weights is not an option because this model has too many accessories like a crowbar and many pouches. Thanks for your time.
I know what I did wrong! The bad mesh deform is because I didn't rename all of the vertex groups and just the arm groups. The weight paint was overlapping from the chest vertex group and renaming it fixed the bad deform.