Function works but doesn't when one number on the UUID is changed.

Why does this one Work
execute run summon item_display ~ ~ ~ {UUID:[I;0,0,0,0]} execute at @e[tag=player1,tag=!l1,limit=1] positioned ^ ^0.78 ^1 run loot replace entity 0-0-0-0-0 contents loot blockstate:get data modify entity @e[tag=Props1,limit=1] block_state set from entity 0-0-0-0-0 item.components.minecraft:custom_data kill 0-0-0-0-0
But this one doesn't?
execute run summon item_display ~ ~ ~ {UUID:[I;0,0,0,10]} execute at @e[tag=player2,tag=!l2,limit=1] positioned ^ ^0.78 ^1 run loot replace entity 0-0-0-0-10 contents loot blockstate:get data modify entity @e[tag=Props2,limit=1] block_state set from entity 0-0-0-0-10 item.components.minecraft:custom_data kill 0-0-0-0-10
Each is a separate function running every tick