Issue
Scheduled workflows which are scheduled to run once a day is running every 5 minutes.
Resolution
Check the WorkflowSchedules table in the Nintex Config database for any duplications.
Delete the duplications using the following SQL code:
Delete the duplications using the following SQL code:
DELETE
FROM [NW2013DB].[dbo].[WorkflowSchedule]
WHERE WorkflowID = 'your-Workflowid'
Then recreate the schedule from the SharePoint site.