I am experiencing the same issue as the original poster, where the error message “Value cannot be null. (Parameter ‘key’)” appears each time I perform ‘Regenerate Schema,’ but it disappears after saving.
Interestingly, this issue started on the same day the original post was made. I have already checked all the key columns in the database, and they appear to be properly filled.
Since I have too many columns to send a configuration for each, could you kindly provide some guidance on what steps I should take to resolve this issue?