/fill from to tileName tileData replace tileName tileData not working

I am using https://www.digminecraft.com/game_commands/fill_command.php for help using the /fill command. I’m entering this command: /fill 87 69 368 86 70 369 stained_hardened_clay 11 replace stained_hardened_clay 14. Nothing is working. I’ve tried minecraft:stained_hardened_clay, 159 as the ID of the tile. Please help.