Patch Issues/Misconfigured

Good Day! Anyone who have the problem where you have patched fixtures which are previously working that are not working anymore. Couple of weeks ago we I have some fixtures working then added new fixtures on my rig and took them down after an event now my old fixtures are not working (no lights on DMX, ACT and POWER). I have checked my fixtures window and they are patched and have addresses. Tried running my back up file and the fixtures that are not working have lights and working now. Is there something I did that made them not work?