You’ve set up multiple Vault clusters, one on-premises intended to be the primary cluster, and...

There is a certificate mismatch after replication was enabled since Vault replication generates its own TLS certificates to ensure nodes are trusted entities

All of the data on the secondary cluster was deleted after replication was enabled

The data was automatically copied to the primary cluster after replication was enabled since all writes are always forwarded to the primary cluster

The data was moved to a recovery path after replication was enabled. Use the vault secrets move command to move the data back to its intended location