Conflicting Settings Error

I was updating a page on a clients HTML website, and without telling me, he also started working on the same page (super frustrating and I've had a conversation with him about it so it won't happen again). Anyway, I was having issues connecting to the server and kept getting an FTP error that my user limit was reached and it couldn't connect, so I don't believe I was actually connected. But now it's giving me a conflicting settings error and says that there are sync conflicts and I need to choose which settings to keep, upload sync settings or download sync settings. I can't force close or in any way get out of DW until I select one. I hadn't made any changes on my end so the changes the client made need to stay. Can someone explain this error to me so that I can make an informed decision? What is download sync settings vs upload sync settings? Again, what's on my local computer is not accurate and what is on the website is. See screenshots.

I have adobe creative cloud so I'm using the most up-to-date version of DW. My device is a Macbook with macOS Ventura 13.2.1. Thanks for your help!