Your global Angular CLI version (11.0.5) is greater than your local version (10.2.0). The local Angular CLI version is used code example
Example: Your global Angular CLI version (11.0.2) is greater than your local version
# Install npm-check-updates
$ npm i -g npm-check-updates
# Run npm-check-updates with -u, will upgrade package.json
$ ncu -u
# Install updated packages
$ npm install