diff --git a/app/db/models.py b/app/db/models.py
index 4893197..98a392a 100644
--- a/app/db/models.py
+++ b/app/db/models.py
@@ -414,7 +414,7 @@ class Node(Base):
     user_usages = relationship(
         "NodeUserUsage",
         back_populates="node",
-        cascade="all, delete, delete-orphan",
+        cascade="save-update, merge",
     )
     usages = relationship(
         "NodeUsage",