Not sure what’s happening…I finally got around to downloading 4.8 and when I went to upgrade my 4.7.6 project into 4.8.3  level blueprint is gone, everything I placed in  level is gone…but all my assets are in  content browser. these are  steps I took to update:
-opened 4.8.3
-in  project list, I didn’t see it there so I went to browse and opened  .uproject file
-asked me if i wanted to duplicate  project, I said yes, it duplicated and opened…but nothing I placed in  level showed up. only  default FPS stuff.
anyone have an idea what’s going on here?
             
            
              
              
              
            
            
           
          
            
            
              Hey jeremy,
It sounds like  project is loading  wrong map. If you open your maps folder in  Content Browser, do you see  map you were using in 4.7.6?
             
            
              
              
              
            
            
           
          
            
            
              thanks for  quick response! ah so i migrated my minimal_default from 4.7.6 to my 4.8.3 project and that seems to have worked. why did this happen though? i assume  4.8.3 just overwrote  old one since i never bothered to rename it. should i rename it? will this mess up anything? thanks again!
             
            
              
              
              
            
            
           
          
            
            
              Hey jeremy,
I was able to reproduce this when converting a project from 4.7.6 to 4.8.3;  content of  Minimal_Default Level Blueprint was removed during  conversion. I tested  same thing upgrading from 4.7.6 to 4.9 Preview 1, as well as from 4.8.3 to 4.9 Preview 1, and  same thing did not occur. I believe this has already been fixed, but please let me know if  same thing happens upon converting to future versions of  engine.
Renaming  Minimal_Default map shouldn’t be necessary, but you certainly have that option. Just make sure if you do, do a quick check on any places that reference that level name (Open Level nodes, for example). You’ll also want to open up Project Settings > Maps & Modes and ensure you have  renamed map set appropriately if you’re using it as your Editor default or Game default.
Thanks for  report!