diff --git a/unilabos/app/web/client.py b/unilabos/app/web/client.py
index 6eedfdd8..61a98511 100644
--- a/unilabos/app/web/client.py
+++ b/unilabos/app/web/client.py
@@ -132,7 +132,7 @@ class HTTPClient:
         """
         response = requests.put(
             f"{self.remote_addr}/lab/material",
-            json=resources,
+            json={"nodes": resources},
             headers={"Authorization": f"Lab {self.auth}"},
             timeout=100,
         )
diff --git a/unilabos/registry/devices/liquid_handler.yaml b/unilabos/registry/devices/liquid_handler.yaml
index 50d24152..3d9b75f9 100644
--- a/unilabos/registry/devices/liquid_handler.yaml
+++ b/unilabos/registry/devices/liquid_handler.yaml
@@ -7304,151 +7304,6 @@ liquid_handler.prcxi:
           title: LiquidHandlerRemove
           type: object
         type: LiquidHandlerRemove
-      set_group:
-        feedback: {}
-        goal:
-          group_name: group_name
-          volumes: volumes
-          wells: wells
-        goal_default:
-          group_name: ''
-          volumes:
-          - 0.0
-          wells:
-          - category: ''
-            children: []
-            config: ''
-            data: ''
-            id: ''
-            name: ''
-            parent: ''
-            pose:
-              orientation:
-                w: 1.0
-                x: 0.0
-                y: 0.0
-                z: 0.0
-              position:
-                x: 0.0
-                y: 0.0
-                z: 0.0
-            sample_id: ''
-            type: ''
-        handles: {}
-        result: {}
-        schema:
-          description: ''
-          properties:
-            feedback:
-              properties: {}
-              required: []
-              title: LiquidHandlerSetGroup_Feedback
-              type: object
-            goal:
-              properties:
-                group_name:
-                  type: string
-                volumes:
-                  items:
-                    type: number
-                  type: array
-                wells:
-                  items:
-                    properties:
-                      category:
-                        type: string
-                      children:
-                        items:
-                          type: string
-                        type: array
-                      config:
-                        type: string
-                      data:
-                        type: string
-                      id:
-                        type: string
-                      name:
-                        type: string
-                      parent:
-                        type: string
-                      pose:
-                        properties:
-                          orientation:
-                            properties:
-                              w:
-                                type: number
-                              x:
-                                type: number
-                              y:
-                                type: number
-                              z:
-                                type: number
-                            required:
-                            - x
-                            - y
-                            - z
-                            - w
-                            title: orientation
-                            type: object
-                          position:
-                            properties:
-                              x:
-                                type: number
-                              y:
-                                type: number
-                              z:
-                                type: number
-                            required:
-                            - x
-                            - y
-                            - z
-                            title: position
-                            type: object
-                        required:
-                        - position
-                        - orientation
-                        title: pose
-                        type: object
-                      sample_id:
-                        type: string
-                      type:
-                        type: string
-                    required:
-                    - id
-                    - name
-                    - sample_id
-                    - children
-                    - parent
-                    - type
-                    - category
-                    - pose
-                    - config
-                    - data
-                    title: wells
-                    type: object
-                  type: array
-              required:
-              - group_name
-              - wells
-              - volumes
-              title: LiquidHandlerSetGroup_Goal
-              type: object
-            result:
-              properties:
-                return_info:
-                  type: string
-                success:
-                  type: boolean
-              required:
-              - return_info
-              - success
-              title: LiquidHandlerSetGroup_Result
-              type: object
-          required:
-          - goal
-          title: LiquidHandlerSetGroup
-          type: object
-        type: LiquidHandlerSetGroup
       set_liquid:
         feedback: {}
         goal:
@@ -7824,56 +7679,6 @@ liquid_handler.prcxi:
           title: Transfer
           type: object
         type: Transfer
-      transfer_group:
-        feedback: {}
-        goal:
-          source_group_name: source_group_name
-          target_group_name: target_group_name
-          unit_volume: unit_volume
-        goal_default:
-          source_group_name: ''
-          target_group_name: ''
-          unit_volume: 0.0
-        handles: {}
-        result: {}
-        schema:
-          description: ''
-          properties:
-            feedback:
-              properties: {}
-              required: []
-              title: LiquidHandlerTransferGroup_Feedback
-              type: object
-            goal:
-              properties:
-                source_group_name:
-                  type: string
-                target_group_name:
-                  type: string
-                unit_volume:
-                  type: number
-              required:
-              - source_group_name
-              - target_group_name
-              - unit_volume
-              title: LiquidHandlerTransferGroup_Goal
-              type: object
-            result:
-              properties:
-                return_info:
-                  type: string
-                success:
-                  type: boolean
-              required:
-              - return_info
-              - success
-              title: LiquidHandlerTransferGroup_Result
-              type: object
-          required:
-          - goal
-          title: LiquidHandlerTransferGroup
-          type: object
-        type: LiquidHandlerTransferGroup
       transfer_liquid:
         feedback: {}
         goal:
diff --git a/unilabos_msgs/CMakeLists.txt b/unilabos_msgs/CMakeLists.txt
index c67bdf47..0725514f 100644
--- a/unilabos_msgs/CMakeLists.txt
+++ b/unilabos_msgs/CMakeLists.txt
@@ -68,12 +68,10 @@ set(action_files
   "action/LiquidHandlerSetTipRack.action"
   "action/LiquidHandlerStamp.action"
   "action/LiquidHandlerTransfer.action"
-  "action/LiquidHandlerSetGroup.action"
   "action/LiquidHandlerTransferBiomek.action"
   "action/LiquidHandlerIncubateBiomek.action"
   "action/LiquidHandlerMoveBiomek.action"
   "action/LiquidHandlerOscillateBiomek.action"
-  "action/LiquidHandlerTransferGroup.action"
   "action/LiquidHandlerAdd.action"
   "action/LiquidHandlerMix.action"
   "action/LiquidHandlerMoveTo.action"