diff --git a/includes/admin/core/class-admin-settings.php b/includes/admin/core/class-admin-settings.php
index 74af0edc..31e8141a 100644
--- a/includes/admin/core/class-admin-settings.php
+++ b/includes/admin/core/class-admin-settings.php
@@ -70,6 +70,7 @@ if ( ! class_exists( 'um\admin\core\Admin_Settings' ) ) {
 
 			add_filter( 'um_change_settings_before_save', array( $this, 'set_default_if_empty' ), 9, 1 );
 			add_filter( 'um_change_settings_before_save', array( $this, 'remove_empty_values' ), 10, 1 );
+			add_action( 'wp_trash_post', array( $this, 'change_default_form' ) );
 		}
 
 
@@ -3515,5 +3516,54 @@ if ( ! class_exists( 'um\admin\core\Admin_Settings' ) ) {
 
 			return $settings;
 		}
+
+
+		public function change_default_form( $form_id ) {
+			if ( 'um_form' === get_post_type( $form_id ) ) {
+				$core_forms = get_option( 'um_core_forms', array() );
+				$mode       = get_post_meta( $form_id, '_um_mode', true );
+				if ( isset( $mode ) && absint( $form_id ) === absint( $core_forms[ $mode ] ) ) {
+					$args = array(
+						'post_type'      => 'um_form',
+						'meta_key'       => '_um_mode',
+						'meta_value'     => $mode,
+						'posts_per_page' => 1,
+						'orderby'        => 'date',
+						'post_status'    => 'publish',
+						'order'          => 'DESC',
+						'fields'         => 'ids',
+						'post__not_in'   => array( $form_id ),
+					);
+
+					$forms = get_posts( $args );
+					if ( ! empty( $forms ) ) {
+						$new_form_id         = $forms[0];
+						$core_forms[ $mode ] = $new_form_id;
+
+						/**
+						 * Filters Ultimate Member default forms ids.
+						 *
+						 * @param {array} $core_forms Default forms ids.
+						 * @param {int}   $form_id    Deleted form ID.
+						 *
+						 * @return {array} Default forms ids.
+						 *
+						 * @since 2.8.x
+						 * @hook um_default_forms_ids
+						 *
+						 * @example <caption>Set default profile form ID as 1.</caption>
+						 * function my_um_default_forms_ids( $core_forms, $form_id ) {
+						 *     // your code here
+						 *     $core_forms['profile'] = 1;
+						 *     return $core_forms;
+						 * }
+						 * add_filter( 'um_default_forms_ids', 'my_um_default_forms_ids', 10, 2 );
+						 */
+						$core_forms = apply_filters( 'um_default_forms_ids', $core_forms, $form_id );
+						update_option( 'um_core_forms', $core_forms );
+					}
+				}
+			}
+		}
 	}
 }