diff --git a/bag/sqlalchemy/tricks.py b/bag/sqlalchemy/tricks.py
index ae2af96..1c56cdf 100644
--- a/bag/sqlalchemy/tricks.py
+++ b/bag/sqlalchemy/tricks.py
@@ -140,6 +140,7 @@ def fk_rel(
                 passive_deletes=passive_deletes,
                 order_by=order_by,
                 lazy=lazy,
+                cascade_backrefs=False,
             ),
         )
         if backref