old_contents: """make telephony_phonenumber raw_number nullable True
  
  Revision ID: initial
  Revises: 57f461d001ec
  Create Date: 2013-10-25 18:15:47.156128
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'initial'
  down_revision = '57f461d001ec'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      op.alter_column("telephony_phonenumber", "raw_number", nullable=True)
  
  
  def downgrade():
      op.alter_column("telephony_phonenumber", "raw_number", nullable=False)
  
new_contents: """make telephony_phonenumber raw_number nullable True
  
  Revision ID: dc611df9442
  Revises: initial
  Create Date: 2013-10-25 18:15:47.156128
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'dc611df9442'
  down_revision = 'initial'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      op.alter_column("telephony_phonenumber", "raw_number", nullable=True)
  
  
  def downgrade():
      op.alter_column("telephony_phonenumber", "raw_number", nullable=False)
  
subject: fix parent