delete completed journeys

Organization Name (Required - If you are an Oracle Partner, please provide the organization you are logging the idea on behalf of):

Tesco

Description (Required):

Hello All,

Today, in Production there is a huge number ( > 26396) of active Journeys checklists that are mostly irrelevant
as most of the colleagues to whom the Journeys have been assigned have all already left the business.

We would like to know if there are any performance issues or any other issues if such large number of Journeys remain open/not closed by the terminated colleagues?

Use Case and Business Need (Required):

At Tesco, we have greater than 26396 Journeys that are still Active as part of Offboarding process.