Using 10w-30 accidentally instead of 5w-30
Yes, it's just a little bit heavier (https://www.yourmechanic.com/article/why-does-motor-oil-viscosity-matter), nothing much. You'll get slightly lower gas mileage, but that's the only thing. A lot of guys, as their engines get older, go and switch to 10-30w anyways, when they get older...