public function setPriceModification($value)
    {
        if ($this->exists()) {
            $join = $this->manyMany('Reservations');
            $table = end($join);
            $where = $this->getSourceQueryParam('Foreign.Filter');
            $where["`{$this->baseTable()}ID`"] = $this->ID;
            SQLUpdate::create(
                "`{$table}`",
                array('`PriceModification`' => $value),
                $where
            )->execute();
        }
    }