I just checked by editing my own profile and another profile I have as a subscriber.
Yes, when we edit, there are for example there are two rows with field_id 1, for the same user.
With this I mean that maybe one is edited, but the other doesn’t disappear.
I don’t know if I just should delete the oldest of this, and keep the newest id for each field_id and user_id.
It’s not only one user that I have duplicated content, it seems there are quite a few :-/
Again, thank you for your reply.