Wrong Number of Tiles During the Charleston (Article ID 64)
Abstract: If during the Charleston a player discovers they do not have enough tiles, everyone throws in their tiles, rebuilds their wall and the tiles dealt again.
Question from a player: What happens if I do not have enough tiles during the Charleston?
Answer from the NMJL: If it is discovered, during the Charleston, that any player has an incorrect number of tiles, the hands are thrown in and replayed.
Source: Mah Jongg Made Easy (2020 page 14, Other Tips and Rules for the Charleston)