From 9d081e9fcd3090cc29747ca07b87d21dab2fc54f Mon Sep 17 00:00:00 2001
From: Xuwznln <18435084+Xuwznln@users.noreply.github.com>
Date: Fri, 24 Oct 2025 02:32:33 +0800
Subject: [PATCH] fix multiple instance error

---
 unilabos/ros/nodes/base_device_node.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unilabos/ros/nodes/base_device_node.py b/unilabos/ros/nodes/base_device_node.py
index e2494359..1ec420c4 100644
--- a/unilabos/ros/nodes/base_device_node.py
+++ b/unilabos/ros/nodes/base_device_node.py
@@ -600,7 +600,7 @@ class BaseROS2DeviceNode(Node, Generic[T]):
                         self.lab_logger().warning(
                             f"物料{plr_resource}请求从{old_parent}卸载"
                         )
-                        plr_resource.unassign_child_resource(plr_resource)
+                        old_parent.unassign_child_resource(plr_resource)
                     parent_resource.assign_child_resource(
                         plr_resource, location=None, **additional_params
                     )