How to fix npm ERR! code ENOTOWNER npm ERR! User is not an owner of this package in npm

List the current package owners:

npm owner ls <package-name>

This shows all users with owner permissions. Your username must be in this list for owner-level operations.

Confirm you're logged in as the correct user:

npm whoami

If it shows a different account than expected:

npm logout
npm login

Then enter the credentials for the account that owns the package.

If you need ownership, ask a current owner to add you:

# Current owner runs:
npm owner add <your-username> <package-name>

Only existing owners can add new owners.

For scoped packages (@org/package), verify your organization role:

1. Go to npmjs.com and log in
2. Navigate to your organization settings
3. Check your role (owner, admin, member)
4. Ensure you have publish/manage permissions for the team

Organization admins may need to grant you specific package access.

If you're trying to publish a new package and the name is taken:

{
  "name": "@your-username/package-name"
}

Using a scoped name under your username or organization avoids conflicts with existing packages.

If you believe you should have ownership (e.g., the package was transferred incorrectly):

1. Go to npmjs.com/support
2. Submit a support request
3. Provide evidence of your claim (prior ownership, transfer agreement, etc.)

npm support can investigate and resolve ownership disputes.