What does it mean to dream about past
To dream of the past suggests that a current waking situation is paralleling a past situation. You need to learn from the past and not make the same mistake again. Alternatively, the dream may represent unresolved issues from the past. Or that you need to stop living in the past and look forward toward the future.
To dream that you have a past life indicates greater awareness of your subconscious. You are seeking for better understand of your Self and of your origins. The past life may reflect an actual past life or it may be the life that your parents or grandparents or ancestors were living. Alternatively, the dream refers to previous lessons that you can learn from. You are open to rectifying current issues in order to move forward.