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-rw-r--r--django/db/models/sql/query.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index e68fd9efb7..5a1b68507b 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1620,6 +1620,7 @@ class Query(BaseExpression):
return target_clause
def add_filtered_relation(self, filtered_relation, alias):
+ self.check_alias(alias)
filtered_relation.alias = alias
lookups = dict(get_children_from_q(filtered_relation.condition))
relation_lookup_parts, relation_field_parts, _ = self.solve_lookup_type(