diff --git a/packages/core-elasticsearch/src/indices/rounds.ts b/packages/core-elasticsearch/src/indices/rounds.ts
index e1af0d2d1f..f9b8fdabf9 100644
--- a/packages/core-elasticsearch/src/indices/rounds.ts
+++ b/packages/core-elasticsearch/src/indices/rounds.ts
@@ -24,6 +24,10 @@ export class Rounds extends Index {
                 this.logger.info(`[ES] Indexing ${rows.length} round slots [${first(rounds)} - ${last(rounds)}]`);
 
                 try {
+                    for (const row of rows) {
+                        row.id = `${row.height}_${row.publicKey}`;
+                    }
+
                     await this.bulkUpsert(rows);
 
                     storage.update({