Images generations and favorites are different styles from the first it generated

Hi to all, when I re-opened Firefly, all my previous Imagin generations are different styles from the first he generated, and now they all have a distinct style. It's like if he regenerated all my previous works. This is very bad for a constant workflow because now I have no reference because they are all different styles. Even the ones I have saved as favourites are all different. How can we solve this???