Seaquel
SQL Server error code

SQL Server error 260

SQL Server raises error 260 at severity 16, which marks a problem with the query or data that you can correct.

Disallowed implicit conversion from data type %ls to data type %ls, table '%.*ls', column '%.*ls'. Use the CONVERT function to run this query.
Msg260
Severity16
Group0–999

Source: Database Engine events and errors