condintion summon

command /PetGui [<text>]:
    trigger:
        set {_gui} to chest inventory with 3 rows named "PetGui"
        set slot 10 of {_gui} to Chicken Spawn Egg
        open {_gui} to player
on inventory click:
    event-inventory is not player's inventory
    if name of event-inventory is "PetGui":
        cancel event
        if clicked slot is 10:
            make player execute command "/summon minecraft:horse ~ ~ ~ {CustomName:'"Bullseye"'}" -- tu jest problem
            make player execute command "/ride player mount @e[type=Test,limit=1,distance=1]"

jak by mogl ktos wytlumaczyc czemu tak sie wydarza bym byl wdzieczny