Sometimes when you pap a weapon it replaces your other weapon leaving you with only one gun. And I have no idea what's causing this.

Guns are set in dlc3 code

include_weapon( "mp5" );
	include_weapon( "mp5_upgraded", false );

As well as in _zombiemode weapons

add_zombie_weapon( "mp5", 			"Press and Hold &&1 to buy MP5k [Cost: 1000]", 				1000,	"",				0 );
	add_zombie_weapon( "mp5_upgraded", 			"Press and Hold &&1 to buy MP5k [Cost: 1000]", 				1000,	"",				0 );

Is there something I'm missing in these files or something else I should add somewhere?

I don't use the default waw pack-a-punch. I use the one from Script Placer Z (that is the Harry's pap v.3.0.6)

Any help would be appreciated since I just can't figure this out.

EDIT: Did some testing and I found out that wall weapons cause this issue to happen. If you buy weapon that can only be obtained through mystery box everything is fine.
I currently have these KVPs in the weapons:

targetname            weapon_upgrade
zombie_weapon_upgrade     name of the weapon

EDIT: Did some testing and I found out that wall weapons cause this issue to happen. If you buy weapon that can only be obtained through mystery box everything is fine.
I currently have these KVPs in the weapons:

targetname            weapon_upgrade
zombie_weapon_upgrade     name of the weapon

Have you added upgraded versions of wallweapons in dlc3_code.gsc and _zombiemode_weapons.gsc?
Edit: Check giveWeapon on Harrys perk script?

Have you added upgraded versions of wallweapons in dlc3_code.gsc and _zombiemode_weapons.gsc?
Edit: Check giveWeapon on Harrys perk script?

I think I fixed the issue. Not exactly what you suggested but that helped me a lot.

The issue was in _zombiemode_weapons. I had to replace weapon_give() with harrybo21_give_gun. Have no idea why they weren't there in the first place.

Thanks for your help Will release Hanoi v1.1 soon hopefully fixing the g-spawn and this issue