During the quest line of the Wyrd Sisters (Beldama Wyrd Tree), I had collected too many stones (used to open portals during the quest Reclaiming the Elements). Since I had ended that specific quest and I had too many needless stones, I deleted them. This, to my great surprise, deleted the entire quest line!
This dynamic should be changed : deleting a quest item should not be the direct equivalent of abandoning a quest, unless a warning ask you to confirm that is your intention.
I am now waiting for support to fix this.
Anyone have a work-a-round or trick to regain the quest in my journal ?