Script error when setting max loot spawns to 0

[Ansible2]

\Arma3Survival.Altis\Functions\Waves\fn_spawnLoot.sqf..., line 130

 9:58:16 [BLWK_fnc_spawnLoot] Found excess loot holder, deleteing...
 9:58:16 Error in expression <K_lootHolders deleteAt 0;
deleteVehicle _holder;
};

};

};

>
 9:58:16   Error position: <_holder;
};

};

};

>
 9:58:16   Error Undefined variable in expression: _holder