This tutorial will show you how to maintain marketing sources you have manually created. You cannot change a marketing source of external bookings.
If you would like to replace duplicates or if you want to rename your marketing sources, this is the method that you'll need to use.
Go to Marketing Sources
On the menu, click Tools then Marketing Sources
Replace the Marketing Source
Choose the Marketing Source you would like to replace.
Choose the new Marketing Source to replace the old one.
Click Replace.
Click YES to Confirm.
Click OK.