We are trying to upgrade our Umbraco Site from 11 to 13 but the catch is we do not have the application code with us. We just have production running application and that was build with basic template no code change and deployed for testing and started using it and team lost the original code. Now we need to upgrade to version 13.
Attempt 1
Create a New project with Version 13 and upload settings and content from Prod : I am ending with errors when i try to upload
Attempt 2:
Tried to create a version 11 app and upload settings and content from Prod: this one also ending with different errors each time. I have version 11 Usync and prod and used the same in my new app as well.
Error1: Usync noticed one or more things wrong with the zip file
Error2: errors with some 10 datatypes and link with details and all say “the item does not currently exist, and will be created on Import”.
Can some one please let me know how to upgrade my app to version 13.
Any help is greatly appreciated.