things:acl.notmodifiable

{
  "topic": "unknown/unknown/things/twin/errors",
  "headers": {},
  "path": "/",
  "value": {
    "status": 403,
    "error": "things:acl.notmodifiable",
    "message": "The Access Control List of the Thing with ID 'com.acme:xdk_53' could not be modified.",
    "description": "Check if the ID of the thing was correct and you have sufficient permissions. If you wanted to modify the complete Thing, try modifying it without also changing the Access Control List ('acl')."
  },
  "status": 403
}