Issues with AI-Assisted Formula Editing in New Column Creation

Hi. I am still having the same issue when it comes to using AI to write formulas. I am able to create a new formula column, write a formula and apply it. But when I click "edit column" and I want to edit the formula again using AI, I can't. The pic shows I don't have the option to edit the column using AI to write the code once it has been created.