Problem:
# rndc dumpdb -zones
# grep -A3 "Zone dump of 'my.zone'" /var/named/data/cache_dump.db

; Zone dump of 'my.zone/IN'
;
; zone not loaded# rndc reload my.zone
rndc: 'reload' failed: out of range

Solving:
# ls /var/named/master
my.zone my.zone.jnl
# rm /var/named/master/my.zone.jnl