i was making a game tic-tac-toe using item frames and custom maps as a screen, and after a few times of replacing the maps the image of the map got corrupted. When looking into the folder "data" i found it were created more maps than what it should be. Spaming this command /give @p minecraft:filled_map\{ map: 8} 1 will have the same effect, more maps will be created on that folder.