Bug: Incorrect down_revision in add_ointment_powder_to_medicine_type_enum Migration

Bug: Incorrect down_revision in add_ointment_powder_to_medicine_type_enum Migration

Description

The Alembic migration [add_ointment_powder_to_medicine_type_enum.py] has an incorrect down_revision value (a8b9c0d1e2f3) that does not match the actual parent revision in the migration chain (e4f5a6b7c8d9). This breaks the migration history and can cause Alembic to fail when running [upgrade] or [downgrade commands.

Steps to Reproduce

1. Run alembic upgrade head
2. Observe migration chain error or unexpected ordering

Expected Behavior

Alembic should correctly chain migrations in the right order using the proper down_revision.

Actual Behavior

The migration references a non-existent or wrong parent revision ID, breaking the chain.

Root Cause

The down_revision in the migration file was set to a8b9c0d1e2f3 instead of the correct e4f5a6b7c8d9.