diff --git a/spiffworkflow-backend/migrations/versions/bc2b84d013e0_.py b/spiffworkflow-backend/migrations/versions/bc2b84d013e0_.py
index 12e6e410..80e78c28 100644
--- a/spiffworkflow-backend/migrations/versions/bc2b84d013e0_.py
+++ b/spiffworkflow-backend/migrations/versions/bc2b84d013e0_.py
@@ -22,6 +22,7 @@ def upgrade():
         batch_op.drop_column('identifier')
         batch_op.drop_column('list_index')
 
+    # originally changed in 3191627ae224 but not as a unique key. this will make it unique
     with op.batch_alter_table('task', schema=None) as batch_op:
         batch_op.drop_index('ix_task_guid')
         batch_op.create_index(batch_op.f('ix_task_guid'), ['guid'], unique=True)