Delete individual registrations
Go to Data sources and open a data source.
Find a registration you want to delete and click on its ID (the very left column).
Click Delete in the bottom-left corner and confirm the action.
Delete all registrations at once
It is possible to delete all data from a data source at once. You can use it to refresh your data sources while keeping the data source structure.
Go to Data sources and open your data source settings.
Find the Delete button and click the little arrow to open more deletion options.
Select Delete all registrations and confirm the action.