Hello! Currently, Spine does not support directly importing constraints when combining two skeletons. You can import bones, slots, attachments, and skins, but constraints need to be recreated manually. However, since Spine 4.2, you can copy and paste constraint settings between skeletons, which can help in reconfiguring them. To do this, select the constraint in the tree view, press Ctrl+C
to copy, and then select the target constraint and press Ctrl+V
to paste.