diff --git a/api/src/migrations/1667497567675-ImpactMaterializedViewUniqueIndex.ts b/api/src/migrations/1667497567675-ImpactMaterializedViewUniqueIndex.ts
new file mode 100644
index 0000000000..ecc79a7d1b
--- /dev/null
+++ b/api/src/migrations/1667497567675-ImpactMaterializedViewUniqueIndex.ts
@@ -0,0 +1,18 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class ImpactMaterializedViewUniqueIndex1667497567675
+  implements MigrationInterface
+{
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+        DROP INDEX IF EXISTS idx_georegion_h3data_indexed;
+        CREATE UNIQUE INDEX idx_georegion_h3data_indexed ON impact_materialized_view ("geoRegionId", "h3DataId", "h3index") INCLUDE ("value");
+      `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+        DROP INDEX IF EXISTS idx_georegion_h3data_indexed;
+      `);
+  }
+}
diff --git a/api/src/modules/indicator-records/indicator-record.entity.ts b/api/src/modules/indicator-records/indicator-record.entity.ts
index 46f96da14b..15d140821c 100644
--- a/api/src/modules/indicator-records/indicator-record.entity.ts
+++ b/api/src/modules/indicator-records/indicator-record.entity.ts
@@ -108,7 +108,7 @@ export class IndicatorRecord extends TimestampedBaseEntity {
 
   static updateImpactView(): Promise<void> {
     return getManager().query(
-      `REFRESH MATERIALIZED VIEW ${IMPACT_VIEW_NAME} WITH DATA`,
+      `REFRESH MATERIALIZED VIEW CONCURRENTLY ${IMPACT_VIEW_NAME} WITH DATA`,
     );
   }
 }