changing id elements access level updates field structure

[rw1]

I just went to an id element to change the access level of the viewable version of the element (ie so it wouldn't show to the user when viewing the list), clicked 'Save' and got this message.

Update field structure from int(11) auto_increment to INT(6) NOT NULL AUTO_INCREMENT.

(Possibly this is due to changes that have been made to id field structures in github updates?)