Problems with skins, no saves or duplication

The problem is when I use a custom skin (custom skin), I send the skin file to a character and it is saved, therefore, when creating a new character, with a different skin, the old character is duplicated with the current skin, I will be attaching a video, showing the problem.

It also happens that a lot of characters are not saved, so they have already lost several modified characters.

Video: https://drive.google.com/file/d/19ZkY7rFM3q3qDbHNuQ6x0y7R5puFgAZY/view?usp=sharing
I had to update the drive, as I was unable to do so due to the video being +10MB