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-rw-r--r--django/db/migrations/optimizer.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/migrations/optimizer.py b/django/db/migrations/optimizer.py
index d1b9d8a031..f66a318d8a 100644
--- a/django/db/migrations/optimizer.py
+++ b/django/db/migrations/optimizer.py
@@ -45,9 +45,9 @@ class MigrationOptimizer:
right = True # Should we reduce on the right or on the left.
# Compare it to each operation after it
for j, other in enumerate(operations[i + 1:]):
- in_between = operations[i + 1:i + j + 1]
result = operation.reduce(other, app_label)
if isinstance(result, list):
+ in_between = operations[i + 1:i + j + 1]
if right:
new_operations.extend(in_between)
new_operations.extend(result)