Revert "Fixed #23474 -- Prevented migrating backwards from unapplying the wrong migrations."

This reverts commit abcf28a07695a45cb5fb15b81bffc97bea5e0be3.

1 files changed, 5 insertions, 9 deletions

diff --git a/django/db/migrations/executor.py b/django/db/migrations/executor.py
index 6ebb21fc0b..32aa82b82c 100644
--- a/django/db/migrations/executor.py
+++ b/django/db/migrations/executor.py
@@ -36,15 +36,11 @@ class MigrationExecutor(object):
             # If the migration is already applied, do backwards mode,
             # otherwise do forwards mode.
             elif target in applied:
-                app_label = target[0]
-                next_migration_prefix = str(int(target[1][:4]) + 1)
-                try:
-                    next_migration = self.loader.get_migration_by_prefix(app_label, next_migration_prefix)
-                except KeyError:
-                    # If `target` is the most recent one in its app, there is nothing to do.
-                    pass
-                else:
-                    backwards_plan = self.loader.graph.backwards_plan(next_migration)
+                backwards_plan = self.loader.graph.backwards_plan(target)[:-1]
+                # We only do this if the migration is not the most recent one
+                # in its app - that is, another migration with the same app
+                # label is in the backwards plan
+                if any(node[0] == target[0] for node in backwards_plan):
                     for migration in backwards_plan:
                         if migration in applied:
                             plan.append((self.loader.graph.nodes[migration], True))