4×× Client Error
423 Locked
The source or destination resource of a method is locked.
This response SHOULD contain an appropriate precondition or postcondition code, such as 'lock-token-submitted' or 'no-conflicting-lock'.
- Source: RFC4918 Section 11.3
423 Code References
    Rails HTTP Status Symbol :locked
  
    Rust HTTP Status Constant http::StatusCode::LOCKED
  
    Symfony HTTP Status Constant Response::HTTP_LOCKED