Review your package versions, use `npm dedupe`, or consider yarn workspaces to handle conflicting dependencies.

Dependency conflicts in a Node.js application can result in unpredictable errors, especially when packages have incompatible versions that break expected behaviors. Start by reviewing your package.json file to identify specific versions of conflicting dependencies; running npm ls or yarn list can show a complete dependency tree, helping to reveal where the conflicts lie. Try updating all packages to their latest compatible versions to resolve potential version mismatches; if specific versions are required, use resolutions in package.json to force the desired version across dependencies. Running npm dedupe can help by reorganizing and removing duplicate dependencies, flattening the node_modules structure to prevent conflict. If you’re working within a monorepo, using Yarn workspaces or npm’s workspaces feature can help manage dependencies across multiple projects, ensuring that each package receives the correct version without causing conflicts in the shared codebase. Testing in a clean environment, like a Docker container or a fresh VM, can help verify that your dependency setup functions without conflict.