Import your MAL account animelist into Kuroiru. This tool merge data from MAL (myanimelist.net) into your account. Please ensure that you know what you are doing.
Import
Wipe your kuroiru animelist
Wipe
Export your kuroiru animelist
Export
note : it's recommended to use this to your fresh / secondary MAL account, because it will replace existing duplicate anime, including the ratings & notes data
Anilist Sync