How can I prevent VS Code to revert my changes on save?

I have a file open in VS Code

As you can see on line 1, 5, and 6, there are errors.

When I hovered over them, I saw this message.

Then, I decided to fix them base on the error message suggested.

Now, the 3 errors are gone. BUT as soon as I hit save.

Those errors are coming back. My changes seem to be reverted.

I have this set in my settings.json

"editor.formatOnSave": true

Any suggestions on how can I prevent this behavior?