App Manager Disk Utilization Error

App Manager Disk Utilization Error

 We keep getting the following critical alert on windows 2003 servers:

The disk partition DiskUtilization-D: is removed.Kindly delete it using 'Delete Removed Disk'

When we log into the server there are no errors in the event logs and the partitions are 100% fine. This seems to be a false positive. Has anyone else experienced this? 

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