I too am having this issue, the only way to continue is to quit out and relaunch ai. It has started happening since I updated to Catalina and ai 24.0.3
I use no 3rd party plug ins, mainly use ai and ps.
This problem is starting to swallow up large amounts of my day when trying to switch between projects, so a solution would be awesome.
We have fixed this issue in 24.0.3 version of Illustrator (MAC only issue). Please update to 24.0.3 if you are encountering this issue. For all the other issues which you are encountering regarding the update or the new document dialog or any other please create another User Voice thread for that issue so that we can track it there itself.
Thanks & Regards,
I noticed the same overwrite issue yesterday after the recent update to illustrator. Since updating my Mac to OS Catalina there have been a myriad of issues using the Adobe CC programs, many are not insurmountable, but do become very annoying over a day of trying to get work out on time. having to resave as a different name, then go in delete the old file and rename the new file as the previous is time consuming and therefore costly. C'mon Adobe guys, your product is awesome, get it sorted
This issue has been addressed in Illustrator version 24.0.3 (on MAC) & 24.0.2 (on WIN). Please update to the latest version to verify that your issue is addressed or not.
Thanks & Regards,
I am having the same issue as of today, on a job I started yesterday and was not having the problem. I am not technically minded, so not sure if the adobe.ly/1o2SDsg and get the latest build for version 24.0.2 pre release is something I want to dabble in. Surely, Adobe, if you know there is a fix and paying customers are having problems, you can release a legitimate fix.
This issue is costing me in time, money and my sanity.