Skipping required validation when saving an entity will throw a LogicException instead of an assertion error

When entity validation is set as required on an entity, but it is saved without validation, Drupal will now throw a LogicException instead of raising an assertion error. This could theoretically cause exceptions to surface on production sites for code which previously would only have generated an error during development. To remove the error, validate the entity prior to saving it.

See https://www.drupal.org/docs/drupal-apis/entity-api/entity-validation-api... for more details on entity validation.