An error occured during the database setup

I am at Install.aspx
i have choose Existing database name
from my host database name
on 3 Step i am getting this Error
An error occured: There is already an object named 'Nop_CustomerRole' in the database.
Running scripts from file: E:\web\creativ2\install\Scripts\nopCommerce_createDatabase.sql

can you suggets me any solution

Please see this: https://www.nopcommerce.com/boards/t/8954/error-during-setup-when-using-existing-database.aspx