Column 'username' already exists, skipping.
Column 'fname' already exists, skipping.
Column 'lname' already exists, skipping.
Column 'shopname' already exists, skipping.
Column 'country_code' already exists, skipping.
Column 'address' already exists, skipping.
Column 'full_name' modified successfully to allow NULL.
Column 'phone_number' modified successfully to allow NULL.
Column 'city' modified successfully to allow NULL.
Column 'state' modified successfully to allow NULL.
Column 'zip_code' modified successfully to allow NULL.
Unique constraint on 'username' might already exist or error: SQLSTATE[42000]: Syntax error or access violation: 1061 Duplicate key name 'username'
Database update script completed.