Adjust bwc for #48430

Relates #48430

server/src/main/java/org/elasticsearch/index/seqno/ReplicationTracker.java

@@ -896,7 +896,7 @@ public class ReplicationTracker extends AbstractIndexShardComponent implements L
         this.routingTable = null;
         this.replicationGroup = null;
         this.hasAllPeerRecoveryRetentionLeases = indexSettings.isSoftDeleteEnabled() &&
-            (indexSettings.getIndexVersionCreated().onOrAfter(Version.V_8_0_0) ||
+            (indexSettings.getIndexVersionCreated().onOrAfter(Version.V_7_6_0) ||
             (indexSettings.getIndexVersionCreated().onOrAfter(Version.V_7_4_0) &&
              indexSettings.getIndexMetaData().getState() == IndexMetaData.State.OPEN));
         this.fileBasedRecoveryThreshold = IndexSettings.FILE_BASED_RECOVERY_THRESHOLD_SETTING.get(indexSettings.getSettings());