Due to the out of position penalty that we've implemented you can now change your player position.
If you are a center you can become a Power Forward. If you are a power forward you can become a Center. If you are a point guard you can become a Shooting Guard or a Small Forward. If you are a shooting guard you can become a Small Forward or a Point Guard. If you are a small forward you can become a Point Guard or a Shooting Guard.
Those limits on migrations are there due to the way the algo currently works. Transforming a Center with center-like skills into a PG would essentially ruin the playe wihout a skill redistribution.