newsupernova/vendor/magento/module-release-notification/etc/db_schema.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
    <table name="release_notification_viewer_log" resource="default" engine="innodb"
           comment="Release Notification Viewer Log Table">
        <column xsi:type="int" name="id" padding="10" unsigned="true" nullable="false" identity="true"
                comment="Log ID"/>
        <column xsi:type="int" name="viewer_id" padding="10" unsigned="true" nullable="false" identity="false"
                comment="Viewer admin user ID"/>
        <column xsi:type="varchar" name="last_view_version" nullable="false" length="16"
                comment="Viewer last view on product version"/>
        <constraint xsi:type="primary" referenceId="PRIMARY">
            <column name="id"/>
        </constraint>
        <constraint xsi:type="foreign" referenceId="RELEASE_NOTIFICATION_VIEWER_LOG_VIEWER_ID_ADMIN_USER_USER_ID"
                    table="release_notification_viewer_log" column="viewer_id" referenceTable="admin_user"
                    referenceColumn="user_id" onDelete="CASCADE"/>
        <constraint xsi:type="unique" referenceId="RELEASE_NOTIFICATION_VIEWER_LOG_VIEWER_ID">
            <column name="viewer_id"/>
        </constraint>
    </table>
</schema>