What is the proper method to enter a corrected 1099-DIV?

FYI - I searched and read all related posts on this topic, but never actually found an adequate answer.

I imported my 1099-DIV from my brokerage back in February.  It populated all the forms correctly.

 

Now I have received a CORRECTED 1099-DIV, and want to update my return.  I have NOT filed yet.

Various prior posts/replies indicated just manually updating, but I have a 30-page 1099-DIV, and it has quite a few corrections on it.

I reviewed all of the forms, and there are about half a dozen affected.

So, do you just import the CORRECTED 1099-DIV, or do you delete original, then import the corrected?  Do you need to delete every form that has the original 1099 information in it?

Thank you