whenever i do quick melee with the ext pack (king cobra, uzi etc.) i get this error:

[Customizable Weaponry 2.0 Rev75] addons/cw2_kk_ins2_base-master/lua/autorun/cw_kk_ins/sh_quick_knife.lua:164: Tried to use a NULL entity!
1. SetInflictor - [C]:-1
2. func - addons/cw2_kk_ins2_base-master/lua/autorun/cw_kk_ins/sh_quick_knife.lua:164
3. process - lua/cw/shared/cw_actionsequences.lua:34
4. unknown - addons/cw2_kk_ins2_base-master/lua/weapons/cw_kk_ins2_base_main/o_sh_think.lua:27