Best Answer torka , 12 February 2013 - 11:06 AM
When you set up the account all those years ago, you specified domain.com as your website address. Since then, you've apparently decided to use www.domain.com and have set up everything else to point to the "www" version. However, your site profile in Analytics still points to the "non-www" version.
Log in to Analytics. Click the "Admin" button near the top, on the right. The screen will display a list of accounts (you will probably only have one). Click the name of that account to select it.
The screen will display a list of properties (websites) associated with that account (if you only have one website, there may only be that one listed; if you set up more than one website in Analytics, you may have more than one property included in that account). Click the name of the property that's causing the error message to select it.
The screen will display a list of all the profiles you've set up that are associated with that property. It's likely there will only be one. Click on that profile to select it.
The screen will display the settings for that profile. Click the tab for "Profile Settings". You will see on that tab that the site has been set up for domain.com. Change that to www.domain.com to match what you've set up everywhere else. Make sure your time zone is correct, and if you've specified a default page make sure that is still the correct page name (i.e. "index.html" or "default.asp" or "home.php" or whatever). Click the "Apply" button at the bottom of the page.
I honestly don't know how long it will take, but I'm guessing you will probably have to wait until the following calendar day until you see the change fully in effect.
If you still need more info, try the Google Analytics Help. (Click the "Help" button right next to the "Admin" button on the orange toolbar at the top.)
Hope this helps!
--TorkaGo to the full post