There were a lot of questions answered before the DMG came out that hypothesized about what it might include. Now that the DMG is out, those answers might be wrong. If it's obvious that they are, then one could just propose a new answer with the new information. But what if you don't know if the answers are now wrong, but want people to take another look at the question in light of all the information we now have in the DMG?
(The example I am thinking of right now is Does casting a spell from an item allow you to apply class abilities that are used when casting a spell?, but I have actually wanted to get updated answers on other questions in the past as well.)
The very related meta question, What's the proper way to ask for new answers?, suggests placing a bounty on the original question.
However, if the new information in the DMG allows me to add more detail to the question as well, would it be proper to ask a new more detailed question, referencing the first? (I would obviously try to make it not be a duplicate, but that could be iffy.)
(If it makes a difference, the question in question is "protected".)