Maxscale tries to execute write statement on slave

2021-06-01 16:13:51   warning: (4637894) [readwritesplit] (Read-Write-Service) Slave server 

cannot execute this statement) differs from master's response (OK) to COM_QUERY: `SET STATEMENT max_statement_time = 60 FOR 

      INSERT INTO maillog5

      ( 

        to_email,

        c_d,

        sent,

        text,

        html,

        urgent,

        comment,

        subject,

        thread,

        from_name,

        from_domain,

        source,

        next_try ......