<!-- - Add it to the Lenra project board (on the Backlog). - Add this task to the Epic associated with it after validation. --> ## What should be done Add migration helper like I did in https://github.com/shiipou/gimmick-app/blob/0417922f915c99faf18b6c8967aa27e659ac52c3/src/classes/App.ts
What should be done
Add migration helper like I did in https://github.com/shiipou/gimmick-app/blob/0417922f915c99faf18b6c8967aa27e659ac52c3/src/classes/App.ts