If we consider the scenario where you travel back in time a…

If we consider the scenario where you travel back in time and alter the past, it's possible that the memories of the original past could be affected in some way.
According to the many-worlds interpretation, if you travel back in time and alter the past, you would essentially be creating a new branch of reality that diverges from the original timeline. In this new branch, the events that occurred in the original timeline would no longer be part of the new reality.
However, the question remains: what happens to the memories of the original past? Would they be erased, altered, or preserved in some way?
One possibility is that the memories of the original past would be preserved, but would become inaccessible or frozen in some way. This would mean that the individual who traveled back in time and altered the past would still retain memories of the original timeline, but those memories would no longer be relevant to the new reality.
Another possibility is that the memories of the original past would be altered or rewritten to conform to the new reality. This would mean that the individual who traveled back in time would experience a "memory reset" of sorts, where their memories of the original past would be replaced with new memories that reflect the altered timeline.
However, this raises interesting questions about the nature of identity and personal continuity. If your memories of the past are altered or erased, would you still be the same person? Would your sense of self and identity be affected by the changes to your memories?
It's also possible that the memories of the original past would remain intact, but would become part of a sort of " echo-memory" or " residue" that exists outside of the main timeline. This would mean that the individual who traveled back in time would retain a sort of "ghostly" memory of the original past, even though it's no longer part of the new reality.
In terms of altering who one is or was, the answer depends on how you define personal identity. If your memories and experiences make you who you are, then altering the past could indeed change who you are or were. However, if your identity is more fundamental and unchanging, then altering the past might not affect who you are at your core.
What are your thoughts on this? Do you think altering the past would erase memories of the original past, or would they be preserved in some way? And would changing the past alter who one is or was?