Overflow

Do you have another solution about this error:
Error during initialization:G_ModelIndex: overflow, but decreasing number of models?

Map was working correctly till this day.

level._effect["VehicleFire01"] = LoadFx("fx/fire/tank_fire_libya_distant.efx");
level._effect["VehicleFire02"] = LoadFx("fx/fire/sherman_fire_turret_large.efx");
level._effect["VehicleSmoke01"] = LoadFx("fx/smoke/think_black_smoke_S.efx");
level._effect["VehicleSmoke02"] = LoadFx("fx/smoke/think_black_smoke_M.efx");
level._effect["VehicleSmoke03"] = LoadFx("fx/smoke/think_light_smoke_M_duhoc.efx");

maps\mp\_fx::LoopFx("VehicleFire01", (837, 558, 70), 0.5);
maps\mp\_fx::LoopFx("VehicleFire02", (780, 1321, 60), 0.5);