Thank you for posting in the Community! I found in your account that it looks like you were trying to resend an email. When resending an email, you have the option to select additional lists as well as resending to the same list. Please note that the resend option only sends to new contacts that had not received the email during the first send.In this case, the message that you saw relates to the fact that there were not any contacts in the list selected that are new and had not yet received the email.
If you would like to send to the same lists again. You would want to make a copy of the email and choose your lists again. See how to send the same email to your lists again for a second time here: Copy a Campaign.
To learn more about the difference, see our article for more reference: Difference Between Copying, Resending, and Quicksend.
I hope that helps! Please let us know if you have any more questions!