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-rw-r--r--lib/sqlalchemy/orm/dynamic.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/orm/dynamic.py b/lib/sqlalchemy/orm/dynamic.py
index d55838011..c5ddaca40 100644
--- a/lib/sqlalchemy/orm/dynamic.py
+++ b/lib/sqlalchemy/orm/dynamic.py
@@ -112,7 +112,7 @@ class DynamicAttributeImpl(attributes.AttributeImpl):
def set(self, state, dict_, value, initiator,
passive=attributes.PASSIVE_OFF):
- if initiator is self:
+ if initiator and initiator.parent_token is self.parent_token:
return
self._set_iterable(state, dict_, value)