@fred-freund Ja aber ich habe in dem Objekt, das Du gepostet hast kein val gefunden.
Ausserdem wenn das Deine list Node ist, da kommt ja gar nichts raus:
eb646226-f4d7-450a-955f-209bc0f69011-image.png
Du musst schon das gesamte Objekt ausgeben.
6b8a107f-8687-421e-bc59-484cf71e3806-image.png
Und bei mir funktioniert das auch einwandfrei:
Ich habe mal so einen example state nachgebildet:
3c949caa-914a-497e-aed2-6ce836477a3b-image.png
Also
{
  "common": {
    "name": "example_state",
    "desc": "Manuell erzeugt",
    "role": "state",
    "type": "multistate",
    "read": true,
    "write": false,
    "states": {
      "1": "leak",
      "2": "water leak detected"
    },
    "def": 0
  },
  "type": "state",
  "_id": "0_userdata.0.example_state",
  "acl": {
    "object": 1636,
    "state": 1636,
    "owner": "system.user.admin",
    "ownerGroup": "system.group.administrator"
  },
  "from": "system.adapter.admin.0",
  "user": "system.user.admin",
  "ts": 1668518985872
}
Über den Admin kannst Du theoretisch den Wert so setzen:
2a48d53e-9ed3-462d-9173-b988b05a7923-image.png
c9c7ffde-d67e-4e43-a9da-2fcc0a2f6bf6-image.png
c2003b49-9460-4835-8d9c-4ad7a7838fed-image.png
Spoiler
[
   {
       "id": "690113de17cd64b1",
       "type": "ioBroker list",
       "z": "289f539dcc33814e",
       "name": "example_state",
       "topic": "0_userdata.0.example_state",
       "objType": "state",
       "regex": "",
       "asArray": "false",
       "onlyIDs": "false",
       "withValues": "true",
       "x": 2040,
       "y": 4580,
       "wires": [
           [
               "5fd0d86854a06e05",
               "3b6c06471c41e00b"
           ]
       ]
   },
   {
       "id": "3b6c06471c41e00b",
       "type": "debug",
       "z": "289f539dcc33814e",
       "name": "debug 47",
       "active": true,
       "tosidebar": true,
       "console": false,
       "tostatus": false,
       "complete": "true",
       "targetType": "full",
       "statusVal": "",
       "statusType": "auto",
       "x": 2280,
       "y": 4540,
       "wires": []
   },
   {
       "id": "3e6489ae5381b35c",
       "type": "inject",
       "z": "289f539dcc33814e",
       "name": "",
       "props": [
           {
               "p": "payload"
           },
           {
               "p": "topic",
               "vt": "str"
           }
       ],
       "repeat": "",
       "crontab": "",
       "once": false,
       "onceDelay": 0.1,
       "topic": "",
       "payload": "",
       "payloadType": "date",
       "x": 1840,
       "y": 4580,
       "wires": [
           [
               "690113de17cd64b1"
           ]
       ]
   },
   {
       "id": "5fd0d86854a06e05",
       "type": "change",
       "z": "289f539dcc33814e",
       "name": "",
       "rules": [
           {
               "t": "set",
               "p": "payload",
               "pt": "msg",
               "to": "payload.common.states[msg.payload.val]",
               "tot": "msg"
           }
       ],
       "action": "",
       "property": "",
       "from": "",
       "to": "",
       "reg": false,
       "x": 2290,
       "y": 4580,
       "wires": [
           [
               "e89b20888058e8fc"
           ]
       ]
   },
   {
       "id": "e89b20888058e8fc",
       "type": "debug",
       "z": "289f539dcc33814e",
       "name": "debug 48",
       "active": true,
       "tosidebar": true,
       "console": false,
       "tostatus": false,
       "complete": "false",
       "statusVal": "",
       "statusType": "auto",
       "x": 2480,
       "y": 4580,
       "wires": []
   }
]