How to undo xattr -w com.dropbox.ignored 1.?

Question

Is there any command to undo xattr -w com.dropbox.ignored 1. on MacOS to start syncing the folder back to dropbox?

Update: I found the solution, but not sure if it is the proper way to do it.

Answer 1

The correct way to do this would be:

xattr -d com.dropbox.ignored <path-to-file>

This way, you make sure only to delete the flag in question not any other flags.