我有两个项目有同样的问题，但不清楚为什么npm解决它们的方式不同：

1. https://github.com/Sairyss/domain-driven-hexagon

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: domain-driven-hexagon@2.0.0
npm ERR! Found: slonik@31.4.2
npm ERR! node_modules/slonik
npm ERR!   slonik@"^31.2.4" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer slonik@"27 - 29" from @slonik/migrator@0.11.3
npm ERR! node_modules/@slonik/migrator
npm ERR!   @slonik/migrator@"^0.11.3" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

1. https://github.com/ddd-by-examples/library-nestjs

npm WARN ERESOLVE overriding peer dependency
npm WARN While resolving: rxjs-for-await@0.0.2
npm WARN Found: rxjs@7.4.0
npm WARN node_modules/rxjs
npm WARN   rxjs@"^7.0.0" from the root project
npm WARN   5 more (@nestjs/common, @nestjs/config, @nestjs/core, ...)
npm WARN
npm WARN Could not resolve dependency:
npm WARN peer rxjs@"^6.0.0" from rxjs-for-await@0.0.2
npm WARN node_modules/rxjs-for-await
npm WARN   rxjs-for-await@"0.0.2" from @nrwl/node@13.2.2
npm WARN   node_modules/@nrwl/node
npm WARN   1 more (@nrwl/tao)
npm WARN
npm WARN Conflicting peer dependency: rxjs@6.6.7
npm WARN node_modules/rxjs
npm WARN   peer rxjs@"^6.0.0" from rxjs-for-await@0.0.2
npm WARN   node_modules/rxjs-for-await
npm WARN     rxjs-for-await@"0.0.2" from @nrwl/node@13.2.2
npm WARN     node_modules/@nrwl/node
npm WARN     1 more (@nrwl/tao)

这两个项目都与根项目依赖性有冲突的对等依赖性，但第一个项目使用ERR（无法解决依赖性树）解决，第二个项目使用WARN（覆盖对等依赖性）解决