Why is my enchantment not working

I have the enchantment on a carrot on a stick but when I hit loads of sheep it doesn't make the sheep go on fire This my script and I even tried changing the chance to 1 to make it always light it but it still didnt work { "description": "Blaze", "supported_items": "minecraft:carrot_on_a_stick", "weight": 1, "max_level": 1, "min_cost": { "base": 0, "per_level_above_first": 0 }, "max_cost": { "base": 0, "per_level_above_first": 0 }, "anvil_cost": 0, "slots": [], "effects": { "minecraft:post_attack": [ { "requirements": { "condition": "minecraft:random_chance", "chance": 0.1 }, "effect": { "type": "minecraft:ignite", "duration": 5 }, "enchanted": "attacker", "affected": "victim" } ] } }