Warning in Next.js 13 (and maybe React 18?)

[theDanielJLewis]

When I use this in my Next.js 13 project, I get the following warning in the console:

Warning: A props object containing a "key" prop is being spread into JSX:
  let props = {key: someKey};
  <br {...props} />
React keys must be passed directly to JSX without using spread:
  let props = {};
  <br key={someKey} {...props} />