diff --git a/src/core/server/saved_objects/service/lib/repository.ts b/src/core/server/saved_objects/service/lib/repository.ts
index 685760e81a2b73..3075191d5dc03a 100644
--- a/src/core/server/saved_objects/service/lib/repository.ts
+++ b/src/core/server/saved_objects/service/lib/repository.ts
@@ -1691,7 +1691,9 @@ export class SavedObjectsRepository {
     //   want to always use the type registry to resolve a type's index
     //   (including the default index).
     if (this._migrator.savedObjectsConfig.enableV2) {
-      return `${this._registry.getIndex(type) || this._index}_${this._migrator.kibanaVersion}`;
+      return `${
+        this._registry.getIndex(type) || this._index
+      }_${this._migrator.kibanaVersion.toLowerCase()}`;
     } else {
       return this._registry.getIndex(type) || this._index;
     }