Datamart, change the Workflow owner

The creator of a Datamart is the only one to be able to add a new Datasource to this Datamart, even with all 4 authorizations on the Datamart and admin of the Premium Workspace. When anyone else want to add a new datasource, an error message says that the action is not allowed due to lack of ownership of the [power Query Online] Dataflow.

When a company has several trustfull contributors or moving staff, the DataFlow owner should be changed or be a group or multiple users.