9/28/2022 (00:16)    TR_Mainland.esp    1/3/2012 (01:00)    skraeling    TR_m4_Llaals Sathrobar00000000    Arvud (-4,-26)    -24748    -210551    794    "i have killed the mabrigash before getting this quest. now he gives me the quest, but Atriban is actually in his shop and there is nothing left to do."    

The easiest way to fix this would be to condition the bottommost response to the topic "atriban deras" to getDeadCount TR_m4_q_mm_Ashvubabi == 0.

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While at that:

9/28/2022 (00:14)    TR_Mainland.esp    1/3/2012 (01:00)    skraeling    TR_m4_Mels Berano00000000    Arvud, Mels Berano: Clothier    435    -96    -121    "needs 'services' topic, as he himself claims to know about services in Arvud"