Defend the Duty checkpoint

Defend the Duty checkpoint in the Dump from an incoming mutant wave.
This quest is unmarked and doesn't have any canonical name.
== Walkthrough ==
This quest will only trigger after you steal the case from the Agroprom military base.
As you approach the Duty checkpoint at Dump, an incoming radio transmission will call for help with defending from a wave from boars coming from the Dark Valley. Kill the boars. Talk to Prapor to receive your reward.
== Notes ==
This quest is broken in the vanilla game: regardless of the help, Marked One doesn't get any reward.
== Bugs ==