Updating Existing Pages

Hi I would like to update hundreds of pages on my site and I tried testing it by updating and uploading a single page in a csv file containing the ID as one of the fields.

During the upload attempt I was prompted to make a selection:

“Records in your file will be matched with Pages on your site based on…” with several selections indicated, but post ID is the only one that works for me — The problem is that it wants me to manually enter the post ID, but I have hundreds of pages that I would like to update and the post ID is already specified in the CSV file so I don’t know why it is asking me to manually identify it.

Am I missing something or is there a way to mass-update hundreds of existing pages based on the ID without doing it one by one?