Constant client::rpc::errors::error_codes::PREVIOUS_REQUEST_NOT_FOUND

pub const PREVIOUS_REQUEST_NOT_FOUND: i64 = -32042; // -32_042i64

The error can be given to a request about a previous related request which we can not associate with.

In Parity it was used for rpc check_request(). In parity’s comment: “Checks the progress of a previously posted request (transaction/sign). Should be given a valid send_transaction ID.”