a month sounds like to short a time for this to happen but as i remember canabinoids deteriorate over time due to various factors such as heat light and air exposure, as with all living things that have killed been they begin to break down into their seperate elements etc over time. plus i believe some canabinoids deteriorate faster than others so you may well end up with higher cbn levels compared to more favourable canabinoids, hence a paranoid state could be created. i believe i read this from a good source a few years ago, am fairly sure im correct.