Golf is open to all
Ball (or ball-marker) moved - Accidentally - by any player
There is no penalty if any player (including you) accidentally moves your ball or ball-marker on the putting green.
You must replace your ball on its original spot (which if not known must be estimated) or place a ball-marker to mark that original spot.
Exception – Your Ball Must Be Played as It Lies When It Begins to Move During Your Backswing or Stroke and the Stroke Is Made.