If something changed in your YouTube settings (for example: channel name) you have an option to re-authenticate your channel. By doing this you will force vidIQ to update your channel's data.
Reauthenticating a channel will not delete the channel's data within vidIQ.
In order to reauthenticate your channel:
Navigate to the top-right corner and click on your icon.
Go to "Channel Settings"
Click "Re-authenticate" button
Complete steps listed in parts 2 and 3 of this document.