[BUG] Target undo op not found error

[matejdro]

Describe the bug

I just got this error while trying to undo while reviewing. Not sure how to reproduce it:

Caught exception:
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/aqt/taskman.py", line 138, in _on_closures_pending
    closure()
  File "/usr/lib/python3.11/site-packages/aqt/taskman.py", line 82, in <lambda>
    lambda future: self.run_on_main(lambda: on_done(future))
                                            ^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/aqt/taskman.py", line 102, in wrapped_done
    on_done(fut)
  File "/usr/lib/python3.11/site-packages/aqt/operations/__init__.py", line 127, in wrapped_done
    self._success(result)
  File "/usr/lib/python3.11/site-packages/aqt/reviewer.py", line 434, in after_answer
    self._after_answering(ease)
  File "/usr/lib/python3.11/site-packages/aqt/reviewer.py", line 444, in _after_answering
    gui_hooks.reviewer_did_answer_card(self, self.card, ease)
  File "/usr/lib/python3.11/site-packages/_aqt/hooks.py", line 4173, in __call__
    hook(reviewer, card, ease)
  File "/home/matej/.local/share/Anki2/addons21/759844606/schedule/disperse_siblings.py", line 229, in disperse_siblings_when_review
    mw.col.merge_undo_entries(undo_entry)
  File "/usr/lib/python3.11/site-packages/anki/collection.py", line 1027, in merge_undo_entries
    return self._backend.merge_undo_entries(target)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/anki/_backend_generated.py", line 255, in merge_undo_entries
    raw_bytes = self._run_command(3, 11, message.SerializeToString())
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/anki/_backend.py", line 158, in _run_command
    raise backend_exception_to_pylib(err)
anki.errors.InvalidInput: target undo op not found

Environment

Anki 23.10.1 (fac9e0ee) Python 3.11.6 Qt 6.6.1 PyQt 6.6.1
Platform: Linux-6.6.7-arch1-1-x86_64-with-glibc2.38

Additional context

My config:

[L-M-Sherlock]

Do you use any other add-ons?

[L-M-Sherlock]

ankitects/anki@30ae9f7

It's a bug of Anki. And it has been fixed in 23.10. But seems the error still persists. I need to dive into it.

[matejdro]

Here are all my addons:

[L-M-Sherlock]

I guess it's due to the second add-on.

[matejdro]

I kinda doubt it, all this addon does is set the ease of the spacebar button.

Automatic_Scoring.py.txt

[L-M-Sherlock]

Could you reproduce this error in Anki 23.12?

[matejdro]

I can't reproduce it on any version 🤷‍♂️.