What Erika means to say is that it sounds like you have a problem in the data exported from DragonBones. We can't help with DragonBones giving you bad data, but we can of course help you with all parts of the Spine side of things.
Can you post a screenshot of the problem so we can better understand what you are trying to fix?
You can adjust the weights for a mesh without recreating the bones. Did you try using the weights tool to set the weights you want?
Weights view - Spine User Guide
We don't currently have a way to take the weight a bone has and change it to a different bone. I'm not sure that is what you need right now, but we plan to add it in v4.1:
https://github.com/EsotericSoftware/spine-editor/issues/301