How to Fix Package Version Conflict in AI-Built Apps

Incompatible package versions cause build failures or runtime errors. AI tools frequently mix packages that require different peer dependency versions.

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Error messages you might see

npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! Could not resolve dependency: peer requires react@"^18.0.0" but found react@"19.2.0"

Why this happens in AI-generated code

1

Peer dependency mismatches

AI installs packages built for different major versions of React, Next.js, or other frameworks.

2

Duplicate packages

Multiple versions of the same package are installed, causing conflicts in the module resolution.

3

Lock file out of sync

The lock file references versions that don't match package.json, often from AI-suggested manual edits.

How to fix it

1

Delete lock file and reinstall

Remove `node_modules` and the lock file, then run `npm install` to generate a fresh, consistent dependency tree.

2

Use --legacy-peer-deps cautiously

As a temporary fix, use `npm install --legacy-peer-deps` but plan to update incompatible packages.

3

Get professional help

Our code audit identifies this issue and provides a fix. Start at springcode.co/products for $19.

Related technologies

Node.jsReactNext.js

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Frequently asked questions

What does ERESOLVE mean?

It means npm found conflicting version requirements in your dependency tree and cannot satisfy all peer dependencies simultaneously.

Should I use --force to install?

Avoid --force as it can introduce subtle runtime bugs. Resolve the actual version conflicts instead.

Related resources

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