diff --git a/apps/assets/signal_handlers/asset.py b/apps/assets/signal_handlers/asset.py
index 5aac26319..86e6a0a9a 100644
--- a/apps/assets/signal_handlers/asset.py
+++ b/apps/assets/signal_handlers/asset.py
@@ -103,6 +103,7 @@ def on_asset_nodes_add(instance, action, reverse, pk_set, **kwargs):
     # m2m_model.objects.bulk_create(to_create)
     #
 
+
 RELATED_NODE_IDS = '_related_node_ids'
 
 
diff --git a/apps/perms/apps.py b/apps/perms/apps.py
index f9d1e6f42..432c194cd 100644
--- a/apps/perms/apps.py
+++ b/apps/perms/apps.py
@@ -10,5 +10,5 @@ class PermsConfig(AppConfig):
 
     def ready(self):
         super().ready()
-        # from . import signal_handlers
+        from . import signal_handlers
         from . import notifications
diff --git a/apps/perms/models/perm_node.py b/apps/perms/models/perm_node.py
index 438cd5b2d..1db0f2fe7 100644
--- a/apps/perms/models/perm_node.py
+++ b/apps/perms/models/perm_node.py
@@ -32,6 +32,9 @@ class UserAssetGrantedTreeNodeRelation(FamilyMixin, JMSOrgBaseModel):
     node_assets_amount = models.IntegerField(default=0)
     comment = ''
 
+    def __str__(self):
+        return f'{self.user}|{self.node}'
+
     @property
     def key(self):
         return self.node_key
diff --git a/apps/perms/signal_handlers/__init__.py b/apps/perms/signal_handlers/__init__.py
index 6a8ef9467..02faddd04 100644
--- a/apps/perms/signal_handlers/__init__.py
+++ b/apps/perms/signal_handlers/__init__.py
@@ -1,2 +1,2 @@
-from . import asset_permission
-from . import refresh_perms
+from .asset_permission import *
+from .refresh_perms import *
diff --git a/apps/perms/utils/user_perm_tree.py b/apps/perms/utils/user_perm_tree.py
index 7937f2c6f..8888a67e9 100644
--- a/apps/perms/utils/user_perm_tree.py
+++ b/apps/perms/utils/user_perm_tree.py
@@ -121,9 +121,8 @@ class UserPermTreeExpireUtil(_UserPermTreeCacheMixin):
         for org_id, perm_id in org_perm_ids:
             org_perms_mapper[org_id].add(perm_id)
         for org_id, perms_id in org_perms_mapper.items():
-            org_ids = [org_id]
             user_ids = AssetPermission.get_all_users_for_perms(perm_ids, flat=True)
-            self.expire_perm_tree_for_users_orgs(user_ids, org_ids)
+            self.expire_perm_tree_for_users_orgs(user_ids, [org_id])
 
     def expire_perm_tree_for_user_group(self, user_group):
         group_ids = [user_group.id]
@@ -138,7 +137,7 @@ class UserPermTreeExpireUtil(_UserPermTreeCacheMixin):
     @on_transaction_commit
     def expire_perm_tree_for_users_orgs(self, user_ids, org_ids):
         org_ids = [str(oid) for oid in org_ids]
-        with self.client.pipline() as p:
+        with self.client.pipeline() as p:
             for uid in user_ids:
                 cache_key = self.get_cache_key(uid)
                 p.srem(cache_key, *org_ids)
@@ -147,7 +146,7 @@ class UserPermTreeExpireUtil(_UserPermTreeCacheMixin):
 
     def expire_perm_tree_for_all_user(self):
         keys = self.client.keys(self.cache_key_all_user)
-        with self.client.pipline() as p:
+        with self.client.pipeline() as p:
             for k in keys:
                 p.delete(k)
             p.execute()