'How could I solve a peer dependency conflict?

I read some articles about peer dependencies, I know it's usually used in a plugin's package.json file.

For example, if I had a project and installed a package A (npm<3 || >7) with a peer dependency of package B, then the directories may look like:

Project
  |__node_modules
     |__package A
     |__package B

If my project already had a dependency of package B (v1.x).

Then I installed a package A with a peer dependency of package B (v2.x).

Also I installed a package C with a peer dependency of package B (v3.x).

How could I fix this problem?

npm yarnpkg

Solution 1:^[1]

See How to handle conflicting peer dependencies? The easiest solution is to run npm install with the --legacy-peer-deps flag

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Solution	Source
Solution 1	rÃ¤ph