Seaquel
SQL Server error code

SQL Server error 9843

SQL Server raises error 9843 at severity 16, which marks a problem with the query or data that you can correct.

Unicode escape character '%.*ls' is invalid. Unicode escape character should be of 1 character length and a code point ranging from U+0020 up to U+007E.
Msg9843
Severity16
Group9000–9999

Source: Database Engine events and errors