api_key_id column will have to be dropped in a separate PR

This is to avoid situation where we deploy migration already
but don't deploy code yet and they are not compatible for a while
which leads to errors.

migrations/versions/0363_cancelled_by_api_key.py

@@ -41,13 +41,11 @@ def upgrade():
     )
     op.get_bind()
     op.execute("UPDATE broadcast_message SET created_by_api_key_id=api_key_id")  # move data over
-    op.drop_column('broadcast_message', 'api_key_id')
     # ### end Alembic commands ###
 
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.add_column('broadcast_message', sa.Column('api_key_id', postgresql.UUID(), autoincrement=False, nullable=True))
     op.drop_constraint(
         "ck_broadcast_message_created_by_not_null",
         "broadcast_message"