glTF: fix re-exporting mutltiple animations (regression)

io_scene_gltf2/__init__.py

@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (1, 2, 30),
+    "version": (1, 2, 31),
     'blender': (2, 82, 7),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/imp/gltf2_blender_animation_bone.py

@@ -178,6 +178,7 @@ class BlenderBoneAnim():
         if not action:
             name = animation.track_name + "_" + obj.name
             action = bpy.data.actions.new(name)
+            action.id_root = 'OBJECT'
             gltf.needs_stash.append((obj, animation.track_name, action))
             gltf.action_cache[obj.name] = action
 

io_scene_gltf2/blender/imp/gltf2_blender_animation_node.py

@@ -49,6 +49,7 @@ class BlenderNodeAnim():
         if not action:
             name = animation.track_name + "_" + obj.name
             action = bpy.data.actions.new(name)
+            action.id_root = 'OBJECT'
             gltf.needs_stash.append((obj, animation.track_name, action))
             gltf.action_cache[obj.name] = action