Knitting Pattern Help

Hi Everyone.
I need some help please, I am trying to work out what this note in my pattern means, I have to start working on the neck shape for my open cardigan, its a v neck. The pattern states, Shape Neck: Note: Do not dec within patt at neck edge when shapings fall at that point. I don’t understand.

Welcome to KH!
Can you give us the pattern name or a link to the pattern? Don’t post the pattern details or scans due to copyrights.