Changing vanilla recipes

[Montalvolll]

04.04 16:29:06 [Server] Server thread/WARN [FML]: Potentially Dangerous alternative prefix minecraft for name leather_helmet, expected leatherworks. This could be a intended override, but in most cases indicates a broken mod.

04.04 16:29:06 [Server] Server thread/WARN [FML]: Potentially Dangerous alternative prefix minecraft for name leather_chestplate, expected leatherworks. This could be a intended override, but in most cases indicates a broken mod.

04.04 16:29:06 [Server] Server thread/WARN [FML]: Potentially Dangerous alternative prefix minecraft for name leather_leggings, expected leatherworks. This could be a intended override, but in most cases indicates a broken mod.

04.04 16:29:06 [Server] Server thread/WARN [FML]: Potentially Dangerous alternative prefix minecraft for name leather_boots, expected leatherworks. This could be a intended override, but in most cases indicates a broken mod.

04.04 16:29:06 [Server] Server thread/INFO [leatherworks]: Removing Recipe: minecraft:leather

How can I avoid this mod changing the vanilla recipes?