diff --git a/backend/open_webui/migrations/versions/a0b1c2d3e4f5_add_memory_user_id_index.py b/backend/open_webui/migrations/versions/a0b1c2d3e4f5_add_memory_user_id_index.py
index a52ade7711..b73e654149 100644
--- a/backend/open_webui/migrations/versions/a0b1c2d3e4f5_add_memory_user_id_index.py
+++ b/backend/open_webui/migrations/versions/a0b1c2d3e4f5_add_memory_user_id_index.py
@@ -6,6 +6,7 @@ Create Date: 2025-09-15 03:00:00.000000
 
 """
 
+import sqlalchemy as sa
 from alembic import op
 
 revision = 'a0b1c2d3e4f5'
@@ -15,7 +16,12 @@ depends_on = None
 
 
 def upgrade():
-    op.create_index('ix_memory_user_id', 'memory', ['user_id'])
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    existing_indexes = {idx['name'] for idx in inspector.get_indexes('memory')}
+
+    if 'ix_memory_user_id' not in existing_indexes:
+        op.create_index('ix_memory_user_id', 'memory', ['user_id'])
 
 
 def downgrade():
diff --git a/backend/open_webui/migrations/versions/a5c220713937_add_reply_to_id_column_to_message.py b/backend/open_webui/migrations/versions/a5c220713937_add_reply_to_id_column_to_message.py
index d54ae24edb..0108e44614 100644
--- a/backend/open_webui/migrations/versions/a5c220713937_add_reply_to_id_column_to_message.py
+++ b/backend/open_webui/migrations/versions/a5c220713937_add_reply_to_id_column_to_message.py
@@ -19,16 +19,18 @@ depends_on: Union[str, Sequence[str], None] = None
 
 
 def upgrade() -> None:
+    conn = op.get_bind()
+    inspector = sa.inspect(conn)
+    msg_cols = {c['name'] for c in inspector.get_columns('message')}
+
     # Add 'reply_to_id' column to the 'message' table for replying to messages
-    op.add_column(
-        'message',
-        sa.Column('reply_to_id', sa.Text(), nullable=True),
-    )
-    pass
+    if 'reply_to_id' not in msg_cols:
+        op.add_column(
+            'message',
+            sa.Column('reply_to_id', sa.Text(), nullable=True),
+        )
 
 
 def downgrade() -> None:
     # Remove 'reply_to_id' column from the 'message' table
     op.drop_column('message', 'reply_to_id')
-
-    pass