Setup failed: There is already an object named 'PermissionRoleMapping' in the database.

Mission critical project, Now I have this problem 

So how should  I go forward can you please join brain storm sessiopn together with me online? 

Pls call to my skype number denis_kovalenko1 so we can fast make sogtware running. Even, I can see some workarounds but I need you to make sure.

One options you can sent me working database

Pls call me because ths wery critical and urgent    

So togetether we can work around and run the softwatre  

So pls explain me how the system checks if database was installed ? 

1. Just by creating the settings.txt with connextion string 
2. By editing any configuration file ? say me which one?
3. By editing same configurations database tables, which one ?   

something else or the combination of mentioned by me 

Another question is how the samle data is populated to database ? 

Appreciate any help ?