An administrator has added a Cloud account on Prisma Cloud and then deleted it.

When an administrator adds a Cloud account to Prisma Cloud and then deletes it, if the deleted account is added back to Prisma Cloud within a 24-hour period, the existing alerts associated with that account will be displayed again. This behavior ensures continuity in monitoring and alerting, allowing security teams to retain visibility into potential security issues or compliance violations associated with the cloud account. Re-displaying existing alerts helps maintain a consistent security posture and ensures that no critical alerts are overlooked during the re-addition process.

https://docs.paloaltonetworks.com/prisma/prisma-cloud/prisma-cloud-admin/manage-prisma-cloud-alerts/view-respond-to-prisma-cloud-alerts