--- set: 4 code: 423 title: Locked references: "Rails HTTP Status Symbol": ":locked" --- The 423 (Locked) status code means 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][1] [1]: