Describe the problem that you experienced

I got the error NG01902 while using the signal forms, not sure if other errors are also not included or its just this one.

https://angular.dev/errors - does not list this error
https://angular.dev/errors/NG01902 - says page not found.

For anyone else running into this error in the meantime:
Turned out I was accidentally trying to set undefined for a field's value which was throwing the error, setting the value to null instead prevented the error.

Enter the URL of the topic with the problem

https://angular.dev/errors

Describe what you were looking for in the documentation

Explanation of NG01902 error (and other signal forms errors) and steps to prevent it