Did anyone ever get back to you on how to handle this? If not, you need to go to MID Server > Server Issues
In there, you should see a list of outstanding issues. Open the one you need to address, there should only be one field you can update; State. Set that to acknowledged if you're currently working on the issue, or Resolved if you have cleared the issue. Once resolved it will clear out the counter on your MID server record.
