sqlite3.DatabaseError: database disk image is malformed

It can happen that the database gets corrupted. The error message you will get is something like sqlite3.DatabaseError: database disk image is malformed

This can be fixed by replacing it with a backup database. If you do not have backup of that file or the backup is to old, you can try the following steps:

1. Make sure TerrariumPI 4 is not running: sudo service terrariumpi stop
2. Enter the TerrariumPI 4 folder and enable the Python environment:
   • cd /home/pi/TerrariumPI
   • source venv/bin/activate
3. Enter the contrib folder: cd contrib
4. Run the fix_db.py script and answer the questions: ./fix_db.py. This will take some time.
5. When done, the database should be restored.
6. Start TerrariumPI 4: sudo service terrariumpi start

A backup of the broken database is left at data/terrariumpi.db.broken. You can delete this database when TerrariumPI is running again. rm data/terrariumpi.db.broken

If this happens a lot, you could look at the FAQ item: Tune database settings to improve the database storage.