Should I use the external ID for a retrieved record or allow ServiceNow to assign it?

[HedgeHodge]

When pulling data from an external API, should I utilize the unique ID from the external records as the primary ID within ServiceNow or should I allow ServiceNow to assign a unique ID.

I want to maintain referential integrity for the various tables I will be retrieving.

[Hitoshi Ozawa]

Information on correction_id provided in the following page. When using correction_id, be sure it is not already used by other feature.

https://servicenowguru.com/integration/correlation-id-display-fields/

https://docs.servicenow.com/bundle/quebec-servicenow-platform/page/administer/integrationhub/concept...