Update loglet_id when copying previous loglet configuration

crates/admin/src/cluster_controller/logs_controller.rs

@@ -325,6 +325,7 @@ fn build_new_replicated_loglet_configuration(
         })
     } else if let Some(sequencer) = log_servers.iter().choose(&mut rng) {
         previous_configuration.cloned().map(|mut configuration| {
+            configuration.loglet_id = rng.next_u64().into();
             configuration.sequencer = **sequencer;
             configuration
         })