After updating all appliances to the latest version the Dashboard Current software version is still displayed in red.
Cli "show version" command shows the same result for all appliances:
The same on the Status > Hosts > Software and Services page
10.9
When the dashboard's Current software version is displayed in red usually means that one or more scanners connected to the control center are not running the latest release.
In more limited cases, there may be an orphan record in the status table for an old scanner with an old version number.
The next step of the investigation is to create a case with technical support, collect and upload a configuration backup with report data from the control center.
That will contain the status tables used by the Dashboard page.