This usually means the save file is from a different version of the game.
Use an app like ZArchiver or your phone’s default "Files" app. Mother-s Lesson Mitsuko APK Save Data Download
Never download a .exe or .msi file if you are looking for Android save data. These are likely malware. This usually means the save file is from
Move the downloaded save data into the saves folder. Confirm "Replace" if prompted. Mother-s Lesson Mitsuko APK Save Data Download