diff --git a/gooddata-api-client/gooddata_api_client/model/provision_database_instance_request.py b/gooddata-api-client/gooddata_api_client/model/provision_database_instance_request.py
index 351952153..898e1f37e 100644
--- a/gooddata-api-client/gooddata_api_client/model/provision_database_instance_request.py
+++ b/gooddata-api-client/gooddata_api_client/model/provision_database_instance_request.py
@@ -60,6 +60,7 @@ class ProvisionDatabaseInstanceRequest(ModelNormal):
 
     validations = {
         ('storage_ids',): {
+            'min_items': 1,
         },
     }