async function prepareLegacyAppointment(order,current) {
  // SQL rechecks ownership. Request parameters cannot supply the pricing rules.
  try {
    return (await Psql.one('SELECT xs_prepare_legacy_appointment($1,$2,$3,$4::jsonb) AS result',
      [DEFAULT_COMPANY_ID,order.objectId,current.id,JSON.stringify(legacyAppointmentSeedRules())])).result;
  } catch(error) {
    return {blockedReason:String(error.message||error).replace(/^.*ERROR:\s*/,'')};
  }
}