about new pet system

[lTz 12]

Hello, today i just add the new pet system to my server, i fix all the stuff but i get stuck here cuz idk what make this error

When i sumon the pet in game he vanish after 1 sec

Serverside sysser is clean

And cliend sysser is :

1201 20:40:42657 ::   File "game.py", line 1945, in BINARY_ServerCommand_Run

1201 20:40:42659 ::   File "stringCommander.py", line 63, in Run

1201 20:40:42659 ::   File "stringCommander.py", line 31, in __call__

1201 20:40:42659 ::   File "stringCommander.py", line 20, in __call__

1201 20:40:42659 ::   File "game.py", line 2002, in SetPetEvolution

1201 20:40:42659 :: IndexError
1201 20:40:42659 :: : 
1201 20:40:42659 :: list index out of range
1201 20:40:42659 :: 

1201 20:40:42659 :: Unknown Server Command PetEvolution 4320 | PetEvolution
1201 20:40:42707 :: Unknown Server Command PetExp 0 300 | PetExp

I have this commands in server/client but idk why i get this err,

If someone know the reason or have similar problem and he can tell me

Ty for help