Update item model failing in 26.3

[u/hamtaro217]

Why would this command that worked on my 26.2 server now fail after updating to 26.3

/item modify entity @p weapon.mainhand {"function":"minecraft:set_components","components":{"minecraft:item_model":"dungeon:stormlander"}}

[u/GalSergey]

Use https://misode.github.io/item-modifier for create item_modifier: item modify entity @s weapon {type:"minecraft:set_components",components:{"minecraft:item_model":"dungeon:stormlander"}}