Missing Return Trip quest after I abandoned it


I had accepted the Rohendel - Return Trip quest on my main character. I abandoned it so that I could pick it up on an alt. When I went back to Gherdia in Rohendel to re-accept the quest, it wasn’t available. I also noticed that this quest was marked as completed in my quest journal. I’m not sure why this happened, and I confirmed that I didn’t receive the skill potion. Please advise.