my advancement isn't loading in and it's not the same problem as last time

so, it's not the same problem as last time, but it's not loading into the game despite being in the same place as the other advancement i got working
{   "display": {     "icon": {       "id": "minecraft:creeper_spawn_egg"     },     "title": "New Life",     "description": "Use a Spawn Egg"   },   "parent": "31end:31end/enter_new",   "criteria": {     "trigger": {       "trigger": "minecraft:using_item",       "conditions": {         "player": {},         "item": {             "items": "#31end:spawn_eggs"         }       }     }   } }