Verify the CIA File IntegrityThe 0xd8e0806a error is frequently caused by a "bad dump." Try downloading the CIA from a different source.
Database Errors: The 3DS "Title Database" is cluttered or corrupted. failed to install cia file 0xd8e0806a updated
If the dbs folder is empty, create two empty text files and rename them to title.db and import.db. Reinsert the SD card into your 3DS. Verify the CIA File IntegrityThe 0xd8e0806a error is
The system will tell you the database is corrupted and offer to reset it. Allow it to do so. failed to install cia file 0xd8e0806a updated
Go to System Settings -> Data Management -> Nintendo 3DS -> Software.