Why did my file save the changes I made when I hit free?

Question

I'm using Open Roads Designer 2021 (Release 2) and Project Wise. 
 I messed up my design, and it was going to take a while to undo every change I made, so I decided to close the file and free it. This usually discards any changes that I made and leaves me with the version of the file that was saved last, which is what I wanted. This time when I opened it back up again it saved my changes. Now I'm stuck because there's not a way to use the undo button anymore. I have a couple of questions. 
 1. Why is it doing this? I'd like to know so it doesn't happen again and I understand if there's something else I'm doing wrong/ don't understand about the software. 
 2. How do I get the previous version of the file back? Is there another way to do it besides requesting an old version of the file from Bentley? 
 Thanks!

Steven Litzau · Accepted Answer

My understanding of this situation is as follows: 
 If ProjectWise is configured to leave local copies when an object if freed, the DGN file that you were working on remains in your local DMS folders, the record on ProjectWise is not updated. 
 When you go to open that file again, ProjectWise knows when the local file was downloaded and checks this against the last changes made to the record on the server. If that file has been updated by another user, you get the updated version from the server. If that file has not been touched, PW assumes your local copy is current and simply opens the local file from your DMS location. 
 So, whether you get the updated file in this instance will depend on whether another user accessed the file. I propose to my clients that a free command to discard changes as you have done, always be followed by purging the local copy of the file. 
 Hope that helps. Steve

Why did my file save the changes I made when I hit free?

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