parvati sativa

got a sativa parvati about 6 weeks into flower when its popped male flowers out on one bottom branch only ,ive cut off the branch straight away and the rest of the plant looks good ,the bottom branch was well down in the shadey area were there was not that much light ,the buds on her are quite big and the plant is about 6 ft tall .i have 2 ak47,s in with her and they are a couple of weeks behind her in flower and they seem happy with big buds all over her .do i have any thing to worrie about or is this the norm .
temp about 75 degree,s and they are under a 600w hps light ,ph about 6.5 and nuts at 1.5 and are in soil this is what ive been told but not sure as this is first time ive grown any help would be greatly appriciated :)