Repair is an offline process which synchronizes the data between nodes, so eventually, all the replicas will hold the same data.
Data that is stored on the nodes can become inconsistent with other replicas over time.
Using Scylla repair will make the data on the node consistent with the other nodes in the cluster.
Run the nodetool repair command regularly. If you delete data frequently, it should be more often than the value of
gc_grace_seconds (by default: 10 days), for example, every week. Use the nodetool -pr on each node in the cluster, sequentially.