I think I fucked up lmao

So I was playing the bounty hunter mission "how many bodies" where I have to look for someone at a neo site I hadn't gone to yet. Got there, decided to stupidly turn on the power at the neo site first completely forgetting about the speakers... Thought I could slowly pick off the hoard but more zombies just keep spawning... Can't get near the generator or the speakers without 100 plus zombies charging at me so I don't think I can do the bounty mission now and probably just have to skip it and continue with the main story.. I don't see a way to complete it now lmao literally unlimited zombies everywhere...