>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3564594. --> Reported by: [freelock](https://www.drupal.org/user/313537) Related to !3 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>ECA 3.x now requires action plugins to have a config schema. Without it, an update to ECA 3.x can cause models using a Matrix API plugin to get deleted!</p> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>Configure a model in Drupal 10.x/ECA 2.x using a Matrix plugin.</p> <p>Update to Drupal 11.3/ECA 3.x.</p> <p>Your model may get deleted!</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>Add Schema. </p> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <h3 id="summary-ui-changes">User interface changes</h3> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3>