I have made a huge mistake.
In Fallout Shelter, you can now go on quests. On these quests, like sending dwellers to the Wasteland, you can assign them Stimpacks and Radaway, and then heal them as necessary as they develop through the quest.
However, on one of the praticuarly more difficult quests, I missed assigning them with the Stimpacks and Radaway, and so they are unable to complete the quest (they keep dying about halfway through)*.
Is there anyway I can restart the quest to assign them the proper healing items to complete the quest?
*Yes I am aware that you find items throughout the quest (if you're lucky) however these are not enough to sustain the team.