little DNs question

[Benjamin John]

Jun 18 17:37:04 omega named[339]: cache zone "" (IN) loaded (serial 0)
Jun 18 17:37:04 omega named[339]: Zone "0.0.127.in-addr.arpa" (file
named.local)
: No default TTL set using SOA minimum instead
Jun 18 17:37:04 omega named[339]: master zone "0.0.127.in-addr.arpa"
(IN) loaded
 (serial 1999033020)
Jun 18 17:37:04 omega named[339]: Zone "firstconsulting.net" (file
db.firstconsu
lting): No default TTL set using SOA minimum instead
Jun 18 17:37:04 omega named[339]: master zone "firstconsulting.net" (IN)
loaded
(serial 1999033022)
Jun 18 17:37:04 omega named[339]: Zone "88/29.92.220.209.in-addr.arpa"
(file db.
209.220.92): No default TTL set using SOA minimum instead
Jun 18 17:37:04 omega named[339]: master zone
"88/29.92.220.209.in-addr.arpa" (I


I get this message about no default TTL
here's my db files

   UW PICO(tm) 3.5            File: db.firstconsulting

@ IN SOA ns.firstconsulting.net. root.firstconsulting.net. (
                1999033022      ; Serial
                10800           ; Refresh after 3 hours
                3600            ; Retry after 1 hour
                604800          ; Expire after 1 week
                86400 )         ; Minimum TTL of 1 day

   UW PICO(tm) 3.5              File: db.209.220.92

88/29.92.220.209.in-addr.arpa.  IN SOA ns.firstconsulting.net.
root.firstconsulting.net. (
                1999033027      ; Serial
                10800           ; Refresh after 3 hours
                3600            ; Retry after 1 hour
                604800          ; Expire after 1 week
                86400 )         ; Minimum TTL of 1 day

any ideas why it gives the TTL error ?

Thanks