<?xml version="1.0" encoding="UTF-8" ?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="Integrated\Bundle\ChannelBundle\Model\Config" repository-class="Integrated\Bundle\ChannelBundle\Model\ConfigRepository" table="channel_connector_config">

        <id name="id" type="integer">
            <generator strategy="AUTO" />
        </id>

        <field name="name" type="string"  />

        <field name="adapter" type="string" />
        <field name="options" type="object" nullable="true" />

        <field name="channels" type="json_array" />

        <field name="publicationStartDate" type="datetime" />
        <field name="created" type="datetime" />
        <field name="updated" type="datetime" />

    </entity>

</doctrine-mapping>

<?xml version="1.0" encoding="UTF-8" ?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">

    <entity name="Integrated\Bundle\ChannelBundle\Model\Config" repository-class="Integrated\Bundle\ChannelBundle\Model\ConfigRepository" table="channel_connector_config">

        <id name="id" type="integer">
            <generator strategy="AUTO" />
        </id>

        <field name="name" type="string"  />

        <field name="adapter" type="string" />
        <field name="options" type="object" nullable="true" />

        <field name="channels" type="json_array" />

        <field name="publicationStartDate" column="publication_start_date" type="datetime" />
        <field name="created" type="datetime" />
        <field name="updated" type="datetime" />

    </entity>

</doctrine-mapping>

Fix column name for publicationStartDate
Fix column name for publicationStartDate
