So i've made a simple crates skript but the problems is sometimes when i right click with the key it didnt give me any rewards and sometimes it gave me 2 rewards on 1 key, can anyone help me to see what's the problem in this code, it'll help me so much. Thx

Code (Text):

1. on right click:
2.   if event-block is a lime stained glass:
3.     if player is holding a tripwire hook named "&a{@ukey}" with lore "&8Use this to open &aUncommon Crate":
4.       remove 1 tripwire hook named "&a{@ukey}" with lore "&8Use this to open &aUncommon Crate" from player's inventory
5.       cancel event
6.       chance of 50%:
7.         give player 8 golden apple
8.         send "{@p} &bYou just got &38 Golden Apples &bfrom the crate"
9.       chance of 13%:
10.         give player 1 of blaze rod of mending named "&cFire Wand" with lore "&cUse &c&lRIGHT CLICK &r&cto shoot a fireball"
11.         send "{@p} &bYou just got &31 Fire Wand &bfrom the crate"
12.       chance of 16%:
13.         give player 1 of sunflower of mending named "&6Token" with lore "&8You can use this to buy &aCustom Items"
14.         send "{@p} &bYou just got &31 Token &bfrom the crate"
15.       chance of 5%:
16.         give player 1 enchanted golden apple
17.         send "{@p} &bYou just got &31 Enchanted Golden Apple &bfrom the crate"
18.       chance of 14%:
19.         give player 2 of tripwire hook named "&a{@ukey}" with lore "&8Use this to open &aUncommon Crate"
20.         send "{@p} &bYou just got &31 Uncommon Key &bfrom the crate"  
21.       chance of 1%:
22.         give player 1 of tripwire hook named "&9{@ekey}" with lore "&8Use this to open &9Epic Crate"
23.         send "{@p} &bYou just got &31 Epic Key &bfrom the crate"  
24.     else:
25.       push the player backwards with speed 2
26.       send "{@p} &bUse {@ukey} to open this crate"

 

okay thx for the help