Seaquel
SQL Server error code

SQL Server error 8434

SQL Server raises error 8434 at severity 16, which marks a problem with the query or data that you can correct.

The message cannot be sent because the message type '%.*ls' is marked SENT BY INITIATOR in the contract, however this service is a Target.
Msg8434
Severity16
Group8000–8999

Source: Database Engine events and errors