Wont let me join a world

When I load up a specific single player world it crashes my game because I did

give @p 276 1 0 {AttributeModifiers:[{AttributeName:"generic.attackDamage",Name:"generic.attackDamage",Amount:50,Operation:0,UUIDLeast:894654,UUIDMost:2872},{ench:[id:34,lvl:1000}]}