text: Title: Can't place multiple devices in rack with non-racked device (using API)
  Body: ### Deployment Type
  
  Self-hosted
  
  ### Triage priority
  
  This is preventing me from using NetBox
  
  ### NetBox Version
  
  v4.1.4
  
  ### Python Version
  
  3.12
  
  ### Steps to Reproduce
  
  1. Create site
  2. Create rack in the site (for example with id = 1)
  3. Create first non-racked device in rack
  4. Create second device
  5. Try placing the the device in the rack as non-racked device via API
  
  Important: I can only reproduce the problem using the REST API.
  
  #### API Calls
  ```
  # Create first device, non-racked in the rack (remember the id, ensure there are no devices non-racked before)
  curl -X POST -H "authorization: Token TOKEN" -H 'Content-Type: application/json' -d '{"device_type":116,"role":25,"site":1,"rack":168}' https://netbox.example.org/api/dcim/devices/ | jq .id
  # Create second device, floating around in the site
  curl -X POST -H "authorization: Token TOKEN" -H 'Content-Type: application/json' -d '{"device_type":116,"role":25,"site":1}' https://netbox.example.org/api/dcim/devices/ | jq . | less
  # Try moving the device to the rack of the first device non-racked (fails)
  curl -X PATCH -H "authorization: Token TOKEN" -H 'Content-Type: application/json' -d '{"rack":168}' https://netbox.example.org/api/dcim/devices/$ID_FROM_THE_FIRST_COMMAND/ | jq . | less
  # Run first command again, creating another device, doesn't fail strangely
  curl -X POST -H "authorization: Token TOKEN" -H 'Content-Type: application/json' -d '{"device_type":116,"role":25,"site":1,"rack":168}' https://netbox.example.org/api/dcim/devices/ | jq .id
  ```
  
  ### Expected Behavior
  
  Device should be placed in the rack as non-racked.
  
  ### Observed Behavior
  
  HTTP 400 Error Code
  
  ```
  {"non_field_errors": ["The fields rack, position, face must make a unique set."]}
  ```