: Backup your data, format the SD card to FAT32 (using GUIFormat for cards larger than 32GB), and move your files back. 3. Clear "Ghost" Data
If all CIAs fail with this error: Replace it immediately. failed to install cia file 0xd8e0806a
Since the 3DS thinks it's already installed, you need to remove the "ghost" data. : Backup your data, format the SD card
The error code typically appears when using the FBI title manager on a modded Nintendo 3DS. It indicates that the console's Application Manager (AM) failed a certificate signature or hash check . In simpler terms, the system found the CIA file to be invalid or corrupted during the installation process. Primary Causes of Error 0xD8E0806A : Backup your data