So i fixed up an old bike recently, and everything was working perfectly until a couple of days ago. Whenever i put pressure on on the crank, forward or back, it makes a wretched clanking/popping noise. I investigated and found that the chain is not seating well on a few parts of the chainring. It is an old stronglight crank and chainring, and i like it a lot, so i want to know if there is anything else to do but get a new crank?

Thanks