Encountering an authentication error following the restoration of an Elasticsearch cluster from a Longhorn volume backup

Elastic seach is deployed on k8s env using elastic-operator. While trying to restore the old data using longhorn volume restoration method the pods came up and running, however there is an authentication error in the pod logs.
{"type": "server", "timestamp": "2025-05-06T16:14:15,351Z", "level": "WARN", "component": "o.e.x.s.a.RealmsAuthenticator", "cluster.name": "isna-es-cluster", "node.name": "isna-es-cluster-es-default-2", "message": "Authentication to realm file1 failed - Password authentication failed for elastic", "cluster.uuid": "WSR7bfC2RYW4Gx0isuWQ1w", "node.id": "pLbxXXoxQgK-MQL6JJYXeA" }
@team could you help on this.