Anki decks wont load

🐛 Bug
1

Before the error happened, I was…
[Replace this text.]

Error message (don't change this) 
Anki 25.07.5 (7172b2d2) (ao)
Python 3.13.5 Qt 6.9.1 PyQt 6.9.1
Platform: macOS-26.1-arm64-arm-64bit-Mach-O

Traceback (most recent call last):

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 3322, in execute_sql
    cursor.execute(sql, params or ())
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^

sqlite3.DatabaseError: database disk image is malformed


During handling of the above exception, another exception occurred:


Traceback (most recent call last):

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/aqt/main.py", line 288, in on_focus_changed
    gui_hooks.focus_did_change(new, old)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/_aqt/hooks.py", line 3496, in __call__
    hook(new, old)
    ~~~~^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/aqt/main.py", line 881, in on_focus_did_change
    self.reviewer.refresh_if_needed()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/aqt/reviewer.py", line 204, in refresh_if_needed
    self.nextCard()
    ~~~~~~~~~~~~~^^

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/aqt/reviewer.py", line 262, in nextCard
    self._showQuestion()
    ~~~~~~~~~~~~~~~~~~^^

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/aqt/reviewer.py", line 405, in _showQuestion
    gui_hooks.reviewer_did_show_question(c)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^

  File "/Users/kmyles-24/Library/Application Support/AnkiProgramFiles/.venv/lib/python3.13/site-packages/_aqt/hooks.py", line 4293, in __call__
    hook(card)
    ~~~~^^^^^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/gui/reviewer.py", line 377, in _add_or_refresh_view_note_button
    ankihub_nid = ankihub_db.ankihub_nid_for_anki_nid(card.nid)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/db/db.py", line 364, in ankihub_nid_for_anki_nid
    .scalar()
     ~~~~~~^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2036, in inner
    return method(self, database, *args, **kwargs)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2301, in scalar
    row = self.tuples().peek(database)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2036, in inner
    return method(self, database, *args, **kwargs)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2286, in peek
    rows = self.execute(database)[:n]
           ~~~~~~~~~~~~^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2036, in inner
    return method(self, database, *args, **kwargs)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2107, in execute
    return self._execute(database)
           ~~~~~~~~~~~~~^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 2280, in _execute
    cursor = database.execute(self)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 3330, in execute
    return self.execute_sql(sql, params)
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 3320, in execute_sql
    with __exception_wrapper__:
         ^^^^^^^^^^^^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 3088, in __exit__
    reraise(new_type, new_type(exc_value, *exc_args), traceback)
    ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 196, in reraise
    raise value.with_traceback(tb)

  File "/Users/kmyles-24/Library/Application Support/Anki2/addons21/1322529746/lib/peewee.py", line 3322, in execute_sql
    cursor.execute(sql, params or ())
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^

peewee.DatabaseError: database disk image is malformed

Sentry link (for developers)

2

Hello,

Your AnkiHub database is corrupted. Please follow these steps if you still have the issue:

  1. Close Anki
  2. Go to the ~/Library/Application Support/AnkiHub folder. The Library folder is hidden by default, but can be revealed in Finder by holding down the option key while clicking on the Go menu.
  3. You should see multiple subfolders with random names. Open each subfolder and delete the ankihub.db file.