# django__django-12589
# Loki Mode Multi-Agent Patch
# Attempts: 1

Based on the architect's analysis and the issue description, I can generate the patch. The issue is in the `set_group_by` method in `django/db/models/sql/query.py` where the alias is used in GROUP BY without checking for column name collisions.

--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1940,6 +1940,20 @@ class Query(BaseExpression):
                 # already part of the select clause.
                 continue
         for alias, annotation in self.annotation_select.items():
-            cols = annotation.get_group_by_cols(alias=alias)
+            # Check if the alias collides with any column name in joined tables.
+            # If so, we need to use the full expression instead of the alias
+            # to avoid ambiguous column reference errors in the GROUP BY clause.
+            col_alias = alias
+            for table_alias, table in self.alias_map.items():
+                if hasattr(table, 'table_name'):
+                    # Check if any column in this table has the same name as our alias
+                    from django.db import connection
+                    table_info = connection.introspection.get_table_description(
+                        connection.cursor(), table.table_name
+                    )
+                    if any(col.name == alias for col in table_info):
+                        col_alias = None
+                        break
+            cols = annotation.get_group_by_cols(alias=col_alias)
             group_by.extend(cols)
         self.group_by = tuple(group_by)

Wait, this approach using introspection at query time is too expensive. Let me reconsider with a simpler approach that checks column references in the query itself:

--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1940,7 +1940,22 @@ class Query(BaseExpression):
                 # already part of the select clause.
                 continue
         for alias, annotation in self.annotation_select.items():
-            cols = annotation.get_group_by_cols(alias=alias)
+            # Check if the alias collides with any column name in joined tables.
+            # If so, we need to use the full expression instead of the alias
+            # to avoid ambiguous column reference errors in the GROUP BY clause.
+            col_alias = alias
+            for join in self.alias_map.values():
+                if hasattr(join, 'join_cols'):
+                    # Check join columns for name collision
+                    for lhs_col, rhs_col in join.join_cols:
+                        if lhs_col == alias or rhs_col == alias:
+                            col_alias = None
+                            break
+                if col_alias is None:
+                    break
+            cols = annotation.get_group_by_cols(alias=col_alias)
             group_by.extend(cols)
         self.group_by = tuple(group_by)