"session" is deprecated and works exactly like "self" in Public API since it has no knowledge of user Sessions
A User is no longer automatically assumed to be the owner of themselves and gets access to edit themselves when the Owner limitation is used in Public API
Workaround for the OwnerLimitation on Users
To make sure the User gets access to themselves when using OwnerLimitation across 4.x and 5.x, the solution is to change the User to be the owner of their own Content item.
This is accomplished using a privileged user to do the following API calls: