# \[Bug\] Fatal error while editing on Anki 2.1.46

**URL:** <https://forums.ankiweb.net/t/bug-fatal-error-while-editing-on-anki-2-1-46/12283>\
**Category:** Help\
**Created:** [August 13, 2021, 5:24pm UTC](https://forums.ankiweb.net/t/bug-fatal-error-while-editing-on-anki-2-1-46/12283 "2021-08-13T17:24:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![marreromarco](https://avatars.discourse-cdn.com/v4/letter/m/48db29/32.png) [@marreromarco](https://forums.ankiweb.net/u/marreromarco)\
**Post date:** [August 13, 2021, 5:24pm UTC](https://forums.ankiweb.net/t/bug-fatal-error-while-editing-on-anki-2-1-46/12283/1 "2021-08-13T17:24:15Z")

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OS: Manjaro Linux (latest edition)

![manjaro](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/2X/8/87b90621602718c19036eb4770f7bd092c810ecd.png)

Add-ons:

 ![2](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/2X/f/f8d8e9ea824a857a7630d53a0c97b1b0b30f848d.png)

A fatal error occurred, and Anki must close. Please report this message on the forums.  
Anki 2.1.46 (94913ec2) Python 3.8.1 Qt 5.15.1 PyQt 5.15.1  
Platform: Linux  
Flags: frz=True ao=True sv=?  
Add-ons, last update check: 2021-08-13 11:17:44

Caught exception:  
Traceback (most recent call last):  
File “aqt/taskman.py”, line 101, in \_on\_closures\_pending  
File “aqt/taskman.py”, line 71, in   
File “aqt/operations/ **init**.py”, line 214, in wrapped\_done  
File “concurrent/futures/\_base.py”, line 432, in result  
File “concurrent/futures/\_base.py”, line 388, in \_\_get\_result  
File “concurrent/futures/thread.py”, line 57, in run  
File “aqt/operations/ **init**.py”, line 199, in wrapped\_op  
File “aqt/editor.py”, line 536, in   
File “anki/notes.py”, line 191, in fields\_check  
File “anki/\_backend/generated.py”, line 355, in note\_fields\_check  
File “anki/\_backend/ **init**.py”, line 126, in \_run\_command  
pyo3\_runtime.PanicException: called `Result::unwrap()` on an `Err` value: PoisonError { … }

Traceback (most recent call last):  
File “aqt/browser/table/model.py”, line 73, in \_fetch\_row\_from\_backend  
File “anki/collection.py”, line 689, in browser\_row\_for\_id  
File “anki/\_backend/generated.py”, line 792, in browser\_row\_for\_id  
File “anki/\_backend/ **init**.py”, line 126, in \_run\_command  
pyo3\_runtime.PanicException: called `Result::unwrap()` on an `Err` value: PoisonError { … }

* * *

Another issue:

Settings are reset to default after Anki crashes. For example, I use the V3 scheduler and suddenly reverts to V2, etc

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<div class="post-metadata">

**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [August 15, 2021, 6:38am UTC](https://forums.ankiweb.net/t/bug-fatal-error-while-editing-on-anki-2-1-46/12283/2 "2021-08-15T06:38:30Z")

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Can you reproduce it without add-ons? [When problems occur - Frequently Asked Questions](https://faqs.ankiweb.net/when-problems-occur.html)

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**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\
**Post date:** [May 1, 2023, 4:55am UTC](https://forums.ankiweb.net/t/bug-fatal-error-while-editing-on-anki-2-1-46/12283/3 "2023-05-01T04:55:28Z")

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Closed on May 1, 2023, 4:55am UTC