WORKAROUND
1. Go to Configure | Scheduling, from the main menu.
2. Select the SQL Server connection affected from the drop-down list.
3. Locate the schedule called "NBT" and double-click it.
4. Ensure the checkbox "Factory settings" is checked.
5. Click OK.
The Factory Settings by default will not collect data or store in the Statistics Repository to disable attempts to collect data from NBT Performance object to suppress the alarm.