Fix: Error in migration

Author: SaptakS

migrations/versions/ce0b8ccd98ce_.py

@@ -18,13 +18,11 @@
 def upgrade():
     ### commands auto generated by Alembic - please adjust! ###
     op.add_column('email_notification', sa.Column('after_ticket_purchase', sa.Integer(), nullable=True))
-    op.drop_column('email_notification', 'event_schedule')
     op.execute('UPDATE email_notification SET after_ticket_purchase = 1 WHERE after_ticket_purchase is NULL ', execution_options=None)
     ### end Alembic commands ###
 
 
 def downgrade():
     ### commands auto generated by Alembic - please adjust! ###
-    op.add_column('email_notification', sa.Column('event_schedule', sa.INTEGER(), autoincrement=False, nullable=True))
     op.drop_column('email_notification', 'after_ticket_purchase')
     ### end Alembic commands ###