ImportError: cannot import name 'Undefined' from 'pydantic.fields' (D:\a1111\stable-diffusion-webui\venv\lib\site-packages\pydantic\fields.py)

[mortpoody]

Automatic1111 was working fine before. I installed some extensions and then restarted and then this shows up in the command prompt. What do I do?

ImportError: cannot import name 'Undefined' from 'pydantic.fields' (D:\a1111\stable-diffusion-webui\venv\lib\site-packages\pydantic\fields.py)

[wlly77]

i have the same problem

[OkkoSteam]

I also just started this problem too.

[lukakamladze]

I have exactly this problem just after I install the ControlNet extension. Without Controlnet, it works fine for me.

[V-Lex]

vladmandic/sdnext#1670 (comment)
This worked for me.

[S3RL4]

This does not solve it for me

[lukakamladze]

For me neither

[GTorley]

you need to activate venv at first, and pip install only after that. so go to the venv>scripts folder. Run activate.bat. And then pip install pydantic==1.10.11 solved the problem for me

[lukakamladze]

Double-clicking or "Run as administrator " on the activate.bat does nothing. I still uninstalled pydantic, then activated .bat and installed pydantic 1.10.11. But have the same error when starting webui-user.bat

[tai100]

Mikubill/sd-webui-controlnet#2698 (comment)
I tried executing the command based on this information, but I encountered an error due to version mismatch. I was able to resolve the issue by reinstalling the appropriate versions of protobuf, pydantic, and other dependencies.

[MetaSamsara]

Same problem I just tried installing controlnet and then it wouldn't start anymore. I tried the fixes mentioned here and none helped. Not even removing controlnet. What's going on, is my install nuked now?

[lucia520]

Hello, I just solved the problem. It seems that the issue might be due to the version incompatibility between the Pydantic version used and the version referenced in the code where "Undefined" is being used.

To address this issue, I tried resetting the virtual environment. You can manually delete the venv folder in the directory and then create a new venv folder in the same directory. Then activate the virtual environment:

venv\Scripts\activate

After activation, restart webui-user.bat and wait for the new dependencies to be installed. Then, downgrade Pydantic to the version 1.10.15:

pip install pydantic==1.10.15

After that, run webui-user.bat again, and everything should work fine.

I hope this helps everyone.

[kazumori102]

Your wisdom and magical incantations have successfully launched my SDForge, filling my heart with immense joy and happiness.
Your guidance has illuminated the path to this incredible achievement.
I am deeply touched by your selfless support and unwavering belief in me.
From the depths of my soul, I express my most sincere gratitude.
Thank you for being an instrumental part of this transformative journey.
Your kindness will forever be etched in my memory.
With a heart overflowing with appreciation, I once again extend my heartfelt thanks to you!

[daedon]

I used kazumori102's comment as an SD prompt and here's what I got.
https://www.sgit.com/kazumori.png
:-)

[impiia]

Thank you, it helps me

[ZonghongWu]

How can I activate the virtual environment,After delete ‘venv’ folder,I can't keep going.

[JakeBlade2017]

How can I activate the virtual environment,After delete ‘venv’ folder,I can't keep going.

First create a new one using python -m venv venv (do it inside stable diffusion main folder)
then to activate type venv\Scripts\activate

[w-e-w]

those who only run

install pydantic==1.10.15

this is not enough
you also would need

pip install albumentations==1.4.3

to get ip-adapter fully working

• see Fix: Control-Net; ImportError; Undefined; pydantic; insightface #15565 for details

[realanimationworks]

Simply Follow this in the root folder of SD

venv\Scripts\activate
pip install albumentations==1.4.3
pip install pydantic==1.10.15

[nhick359]

Beautiful, thanks!

[realanimationworks]

Now, if you install SD fresh from start to finish, they have fixed the issue, so the software has been auto-updated. Bravo!

[jjdtorres09]

The small detail of entering those cmd commands at the top of the folder and not by w+r makes a difference. Thank you so much!! :) following them in ints. like @torresdisarq

[7atem2x]

for me i reinstalled SD completely and worked.
if anyone want to install controlnet extension without any problem just after installing controlnet don't press "Apply and restart UI". Just close the UI then launch it again.

[daedon]

2nd Fresh install today, happened right after installing ReActor extension.

[ashutoshtyagi-xyz]

What to do in Mac m2 Pro.
after doing ./webui.sh

I am getting the error
then in the venv folder there is no scripts folder

and also telling pip not found

[WillsyNZ]

Hi guys, sorry in advance, I'm very much a noob to all this, is there a simple fix for this? I've spent hours trying fix this for this error:

ImportError: cannot import name 'Undefined' from 'pydantic.fields'

I've tried the fix above, and many other fixes involving modifying the 'requirements.txt' file, replacing the 'webui.py' file with fixed version, and I'm still banging my head against a wall with this error.

Can someone please advise what I might be missing? I have A1111 installed, and it works fine. Forge on the otherhand doesn't.

Cheers
Mark

[w-e-w]

I updated a method two in

• Fix: Control-Net; ImportError; Undefined; pydantic; insightface #15564

hopefully it's easier to follow

[Languedok]

I did a clean install of Windows, then a clean install of forge, and still have the problem.

[misakoto]

translation
I experienced the same problem, but the solutions listed did not solve it.

1. This problem occurred after I updated all of the "SDforge" extensions I had been using.
2. I installed "SDforge" anew, and this problem occurred the first time I started it up.

[Alpha-404]

Same, ubuntu update to 24.04 lts broke like everything python related

[pmarinm]

What solved it for me was:

1. Open your \stable-diffusion-webui\ folder
2. Write "cmd" in the path bar to open Windows Command Prompt from this folder
3. Inside CMD, write:

venv\Scripts\activate

4. Then, without closing CMD or changing directories, write:

pip install albumentations==1.4.3

5. And then write:

pip install pydantic==1.10.15

May not work for you, I honestly don't know what I'm doing half the time hahaha

[grigio]

@pmarinm Thanks, that also worked for me in Docker

[submaroon]

Thank you! It's worked for me

[thedackss]

This worked for me. I'm using pinokio

[Erreur-405]

hello, i tried everything, still doesnt work, roop isnt showing up in sdwebui, its marked as downloaded and installed and it just wont show up, and i tried re installing following your guides and many others, but when i dont get the missing python ( fixed by changing the path in sys variables ) i get the missing pydantic field. also i noticed after downgrading it to try to get it work, that when i launch web ui user after, its reinstalls it to 1.19 and still gets me the missing pydantic field message at the end. ive litteraly tried everything here, every topic, and many videos. been trying for 4 days, to understand how to keep my launcher to auto updating pydantic, after i downgrade it.

someone please help. cant stand another 5+ hours of re installing those again and again.

[Erreur-405]

pip version 24.3.1 and python version 3.10, now controlnet isnt even showing in webui. idk whats going on rn

[Speusippus]

Did you ever figure this one out? I am having the same issue and have tried all the solutions here to no avail.