The quest does not inform the quantity of yellowbands to be collected. Searching, I saw on Riddit that the correct quantity is 5, however, I have 9 yellowbands in total, because the camp bandits reappeared and I defeated them a second time, accumulating 9 yellowbands, so that when I return to the city to get my reward, the quest is bugged and cannot be finished because I have more than 5 yellowbands and they are quest items, so they cannot be dropped or sold... I'm playing the PC version.