hi >:3! why i got a problem after installing the mod,what i have to do to fix it?

Crash date: 28/03/2017 21:25:47

PAYDAY 2 Crash log
Application has crashed: C++ exception
...mod_overrides/HK416/Hooks/weaponfactorytweakdata.lua:27: attempt to index field 'wpn_fps_upg_o_45rds' (a nil value)
SCRIPT STACK

Callstack:
         payday2_win32_release  (???)     ???                                                 
         payday2_win32_release  (???)     ???                                                 
         payday2_win32_release  (???)     ???                                                 
         payday2_win32_release  (???)     ???                                                 
         payday2_win32_release  (???)     ???                                                 
         payday2_win32_release  (???)     ???

Current thread: Main

System information:
    Application version : 1.54.4
    CPU : AMD FX(tm)-6300 Six-Core Processor (3 cores); SSE; SSE2; SSE3; SSSE3; SSE4.1; SSE5
    DirectX : 12.0
    GPU : NVIDIA GeForce GT 730 / nvd3dum.dll[21.21.13.7892]
    Language : @ID94cca2fdaccfc2cd@
    Memory :     44965    0MB
    OS : 6.2.9200 () 0x100-0x1 (64 bits)
    Physics : threaded
    Renderer : DX9 threaded
    Sound : Realtek Semiconductor Corp. (Speakers (Realtek High Definition Audio))

Lua information
Lua Hook: present
BLT Hook data: present

Installed PDMods/Override list
   Name: HK416, Type: mod_override, State: Unrecognized, Author: <UNKNOWN>