I have found these log entries in my server's .rpt-log files since I enabled AI players in my mission. I am not nor have I ever used any mods and neither is my server. I am using units of the class B_officer_F, O_officer_F, B_T_Officer_F and O_T_Officer_F as playable units (in different missions) and only change the loadout with the setUnitLoadout-command upon (re)spawn but I do not think that this is causing the duplication since I am also using it on player controlled units but only AI player controlled units are causing the log entries and no such entries appear in my local log files.
[...] 2022/05/15, 12:38:41 Duplicate weapon Throw detected for B_officer_F 2022/05/15, 12:38:41 Duplicate weapon Put detected for B_officer_F 2022/05/15, 12:38:41 Duplicate weapon Throw detected for O_officer_F 2022/05/15, 12:38:41 Duplicate weapon Put detected for O_officer_F [...]
[...] 2022/05/20, 14:45:42 Duplicate weapon Throw detected for B_T_Officer_F 2022/05/20, 14:45:42 Duplicate weapon Put detected for B_T_Officer_F 2022/05/20, 14:45:42 Duplicate weapon Throw detected for O_T_Officer_F 2022/05/20, 14:45:42 Duplicate weapon Put detected for O_T_Officer_F [...]