Navigate to your Sources tab. This can be found on the All Tabs(+) screen. Sometimes you will not have a separate Sources tab, this is fine, you should still have a Settings tab, open that, as shown in the image below.
In this example, we have a two duplicate sources. One is named "Cold Call" and the other is named "COLD CALL". I want to keep "Cold Call" but merge the all caps version with it. Click on the source you want to merge, in this case "COLD CALL".
On the source detail page, click the Merge button at the top.
On the merge screen, type in the name of the source you want to merge into, in this case it is "Cold Call" so type that name into the box and click the hourglass to pick the correct source.
Make sure you check the box next to "Delete Original Source after merge" in order to fully get rid of this duplicate. When you're ready, click the Merge button.
That's it, you've merged a source! If you encounter an error after clicking the "Merge" button, contact our support for assistance and let us know that you were trying to merge sources and tell us what error code you received.