diff --git a/rootfs/helmbroker/cleaner.py b/rootfs/helmbroker/cleaner.py
index 4dffa5a..0b01814 100644
--- a/rootfs/helmbroker/cleaner.py
+++ b/rootfs/helmbroker/cleaner.py
@@ -13,6 +13,8 @@
 
 
 def clean_instance():
+    if not os.path.exists(INSTANCES_PATH):
+        return
     for instance_id in os.listdir(INSTANCES_PATH):
         if os.path.exists(get_instance_file(instance_id)):
             data = load_instance_meta(instance_id)
diff --git a/rootfs/helmbroker/utils.py b/rootfs/helmbroker/utils.py
index 69e59e6..dbbf351 100644
--- a/rootfs/helmbroker/utils.py
+++ b/rootfs/helmbroker/utils.py
@@ -84,7 +84,7 @@ def load_instance_meta(instance_id):
 
 
 def dump_instance_meta(instance_id, data):
-    data["last_modified_time "] = time.time()
+    data["last_modified_time"] = time.time()
     file = get_instance_file(instance_id)
     validate(instance=data, schema=INSTANCE_META_SCHEMA)
     with open(file, "w") as f:
@@ -119,7 +119,7 @@ def load_binding_meta(instance_id):
 
 
 def dump_binding_meta(instance_id, data):
-    data["last_modified_time "] = time.time()
+    data["last_modified_time"] = time.time()
     file = os.path.join(get_instance_path(instance_id), "binding.json")
     validate(instance=data, schema=INSTANCE_META_SCHEMA)
     with open(file, "w") as f: