Below are the steps to extend the time slices:
IMPORTANT: It's recommended to update one to two slices at a time (and after hours), as slice changes can cause performance issues the first time the time slicing job is run after the update (and the time slicing job may take longer to complete the first time after each update).
Note: To update a certain time slice interval (IE Weekly), click on the Slice period column to sort by period type
4. Save the slice changes
5. Unpause/run a Time Slicing job instance
6. Once the time slicing job completes repeat the steps above for each remaining slice that needs to be updated
7. For the changes to be reflected in the Data Warehouse tables/Advanced reporting, then run the Load Data Warehouse job in Full mode