foxrever Unfortunately, the current functionality does not allow you to keep the constraint settings when moving bones from one skeleton to another. We are already aware of this problem and mention it in one of our issue tickets : EsotericSoftware/spine-editor582
However, since Spine 4.2, it is now possible to copy and paste the constraint settings, making it much easier to reconfigure the constraint. (Copying and pasting settings works well for different skeletons as well.)
In the tree view, select the name of the constraint whose settings you want to copy and press Ctrl+C. Then select the name of the constraint you want to paste and press Ctrl+V.
