Could you try the following and see if these alerts go away:
* navigate to /usr/local/WowzaStreamingEngine/stats
* delete the files in that directory ( rm /usr/local/WowzaStreamingEngine/stats/*)
* restart Wowza.
Wowza will recreate the stats database files once it is back up. If the alerts continue to happen then please raise a ticket by emailing your findings to
email@example.com, including a link to this thread and zipped up copies of your [install-dir[/conf/ and [install-dir]/logs.