new_contents: """2.7.5
  
  Revision ID: f06cc80cc8ba
  Create Date: 2021-08-10 14:23:55.144250
  
  """
  from alembic import op
  import sqlalchemy as sa
  
  
  # revision identifiers, used by Alembic.
  revision = 'f06cc80cc8ba'
  down_revision = None
  branch_labels = ('geonature',)
  depends_on = None
  
  
  def upgrade():
      raise Exception("""
      You should manually migrate your database to 2.7.5 version of geonature schema, then stamp your database version to this revision:
          geonature db stamp f06cc80cc8ba
      """)
  
  
  def downgrade():
      raise Exception("""
      This revision do not support downgrade (yet).
      """)
  
subject: add migration file for geonature 2.7.5 schema