Fix for add_node operator: needs to have SKIP_SAVE set for the settings collection to prevent it from re-using settings from a previous call. This would otherwise lead to python exceptions when those properties don't exist for the other node type (point in case: node_tree only is defined for group nodes).

release/scripts/startup/bl_operators/node.py

@@ -46,6 +46,7 @@ class NodeAddOperator():
             name="Settings",
             description="Settings to be applied on the newly created node",
             type=NodeSetting,
+            options={'SKIP_SAVE'},
             )
 
     @staticmethod