Weapon drop on zombie not works

[felixfont]

After the infection, the zombie is left with a weapon from a human. (for example m4a1).
Drop does not works.

L 02/19/2023 - 02:33:28: [CSTRIKE] Invalid weapon id 22
L 02/19/2023 - 02:33:28: [AMXX] Displaying debug trace (plugin "zombie_plague_special_45.amxx", version "4.5")
L 02/19/2023 - 02:33:28: [AMXX] Run time error 10: native error (native "cs_get_user_bpammo")
L 02/19/2023 - 02:33:28: [AMXX] [0] zombie_plague_special_45.sma::drop_weapons (line 11971)
L 02/19/2023 - 02:33:28: [AMXX] [1] zombie_plague_special_45.sma::zombieme (line 6272)
L 02/19/2023 - 02:33:28: [AMXX] [2] zombie_plague_special_45.sma::start_infection_mode (line 6059)
L 02/19/2023 - 02:33:28: [AMXX] [3] zombie_plague_special_45.sma::start_custom_mode (line 6027)
L 02/19/2023 - 02:33:28: [AMXX] [4] zombie_plague_special_45.sma::start_dragon_mode (line 5844)
L 02/19/2023 - 02:33:28: [AMXX] [5] zombie_plague_special_45.sma::start_spy_mode (line 5809)
L 02/19/2023 - 02:33:28: [AMXX] [6] zombie_plague_special_45.sma::start_bombardier_mode (line 5837)
L 02/19/2023 - 02:33:28: [AMXX] [7] zombie_plague_special_45.sma::start_wesker_mode (line 5802)
L 02/19/2023 - 02:33:28: [AMXX] [8] zombie_plague_special_45.sma::start_predator_mode (line 5830)
L 02/19/2023 - 02:33:28: [AMXX] [9] zombie_plague_special_45.sma::start_berserker_mode (line 5795)
L 02/19/2023 - 02:33:28: [AMXX] [10] zombie_plague_special_45.sma::start_nemesis_mode (line 5816)
L 02/19/2023 - 02:33:28: [AMXX] [11] zombie_plague_special_45.sma::start_assassin_mode (line 5823)
L 02/19/2023 - 02:33:28: [AMXX] [12] zombie_plague_special_45.sma::start_survivor_mode (line 5781)
L 02/19/2023 - 02:33:28: [AMXX] [13] zombie_plague_special_45.sma::start_sniper_mode (line 5788)
L 02/19/2023 - 02:33:28: [AMXX] [14] zombie_plague_special_45.sma::start_lnj_mode (line 5776)
L 02/19/2023 - 02:33:28: [AMXX] [15] zombie_plague_special_45.sma::start_multi_mode (line 5705)
L 02/19/2023 - 02:33:28: [AMXX] [16] zombie_plague_special_45.sma::start_plague_mode (line 5630)
L 02/19/2023 - 02:33:28: [AMXX] [17] zombie_plague_special_45.sma::start_swarm_mode (line 5518)
L 02/19/2023 - 02:33:28: [AMXX] [18] zombie_plague_special_45.sma::make_zombie_task (line 5442)

Platform:
ReHLDS 3.12.0.780 + ReGameDLL 5.21.0.575
AmxModX 1.10.0.5461
Metamod-R 1.3.0.131