If something changed in your YouTube settings (for example the channel name) you have an option to re-authenticate your channel. By doing so 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.
Click on "Channel Settings."
Click the "Re-authenticate" button.
Complete the authentication steps.