When creating a new Zone, will the following data break your…

When creating a new Zone, will the following data break your DNS config ?   $TTL    604800@       IN      SOA     ns1.cts4348.fiu.edu. admin.cts4348.fiu.edu. (            3456789     ; Serial             604800     ; Refresh              86400     ; Retry            2419200     ; Expire             604800 )   ; Negative Cache TTL  IN      MX      ns1.cts4348.fiu.edu.    IN      MX      ns2.cts4348.fiu.edu.