Blokowanie knockback'a

Witam, był by ktoś w stanie dopisać mi do tego skriptu, aby ten mob nie mógł być odpychany?

command /boss:
    trigger:
        broadcast "Pojawil się boss"
        set {_loc.x} to random integer between 50 and 100
        set {_loc.z} to random integer between 50 and 100
        set {_loc.y} to 200
        set {_loc} to location at {_loc.x}, {_loc.y}, {_loc.z} in the world "frakcje2"
        spawn a zombie at {_loc}
        set last spawned zombie's name to "&cBOSS"
        apply speed 2 to last spawned zombie for 999 hour
        apply resistance 99 to the last spawned entity for 10 seconds
        set the last spawned entity's max health to 100
        push last spawned entity in the direction of player at speed 5
        heal last spawned entity
        set last spawned zombie's helmet to 397:1
        equip last spawned zombie with diamond chestplate of unbreaking 1
        equip last spawned zombie with diamond leggings of unbreaking 1
        equip last spawned zombie with diamond boots of unbreaking 1
        set last spawned zombie's tool to diamond sword of knockback 1, fire aspect 2, sharpness 2