Fatal error on my anki desktop - What does it mean?

A fatal error occurred, and Anki must close. Please report this message on the forums.
Anki 2.1.65 (aa9a734f) Python 3.9.15 Qt 6.4.3 PyQt 6.4.0
Platform: Windows-10-10.0.19041
Flags: frz=True ao=False sv=?
Add-ons, last update check: 2023-07-07 08:29:53

Caught exception:
Traceback (most recent call last):
File “aqt.webview”, line 604, in handler
File “aqt.editor”, line 582, in
File “aqt.addcards”, line 261, in _add_current_note
File “aqt.addcards”, line 282, in _note_can_be_added
File “anki.notes”, line 195, in fields_check
File “anki._backend_generated”, line 708, in note_fields_check
File “anki._backend”, line 150, in _run_command
pyo3_runtime.PanicException: called Result::unwrap() on an Err value: PoisonError { … }

Caught exception:
Traceback (most recent call last):
File “aqt.taskman”, line 122, in _on_closures_pending
File “aqt.taskman”, line 71, in
File “aqt.taskman”, line 90, in wrapped_done
File “aqt.operations”, line 120, in wrapped_done
File “concurrent.futures._base”, line 439, in result
File “concurrent.futures._base”, line 391, in __get_result
File “concurrent.futures.thread”, line 58, in run
File “aqt.operations”, line 105, in wrapped_op
File “aqt.operations.note”, line 22, in
File “anki.collection”, line 566, in add_note
File “anki._backend_generated”, line 609, in add_note
File “anki._backend”, line 150, in _run_command
pyo3_runtime.PanicException: assertion failed: (left == right)
left: 1688760343938,
right: 0

After restarting Anki, if you find it occurs again, please let us know the steps you’re taking which causes the error to occur.

I am using Anki Web now with no error for while. Thank you

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