Odd Entities.php

<?php
// AccountingInvoiceItem Entity
    /**
     * Transactions used to pay for this invoice item.
     *
     * @var AccountingTransaction[]
     *
     * @ORM\OneToMany(targetEntity="CommonBundle\Entity\AccountingTransaction", mappedBy="invoice_item", cascade={"persist"})
     */
    private $transactions;
    
    
// AccountingTransaction Entity
    /**
     * Related invoice line.
     *
     * @var AccountingInvoiceItem
     *
     * @ORM\ManyToOne(targetEntity="CommonBundle\Entity\AccountingInvoiceItem", inversedBy="transactions", cascade={"persist"})
     */
    private $invoice_item;