While playing Stranger Sins DLC I`ve been asked by Garry to get the Legionary Helm. All objectives were completed, carrot was given to farmer, but I still can not enter his house. My character keeps saying 40 reputation with farmer is needed but theres only 30. No other quests involving farmer were found, he only offers to trade.
Does anyone know whats going on?

It appeared that one have to sleep. Farmer will appear behind front door and thank for the previous quest related to his son, giving the 10 repo.