diff --git a/migrations/m230606_120121_change_access_owner_col_format.php b/migrations/m230606_120121_change_access_owner_col_format.php
new file mode 100644
index 0000000..f893aa1
--- /dev/null
+++ b/migrations/m230606_120121_change_access_owner_col_format.php
@@ -0,0 +1,17 @@
+<?php
+
+use yii\db\Migration;
+
+class m230606_120121_change_access_owner_col_format extends Migration
+{
+    public function up()
+    {
+        // allow uuid and longer strings as access_owner value
+        $this->alterColumn("{{%dmstr_page}}", "access_owner", $this->string(255));
+    }
+
+    public function down()
+    {
+        return false;
+    }
+}
diff --git a/models/BaseTree.php b/models/BaseTree.php
index 77abec5..a58d85a 100644
--- a/models/BaseTree.php
+++ b/models/BaseTree.php
@@ -457,6 +457,13 @@ public function rules()
                         '{0} should not contain any uppercase and special chars!', ['{attribute}']
                     )
                 ],
+                [
+                    [
+                        self::ATTR_ACCESS_OWNER,
+                    ],
+                    'filter',
+                    'filter' => 'strval'
+                ],
                 [
                     [
                         self::ATTR_DOMAIN_ID,
@@ -467,6 +474,7 @@ public function rules()
                         self::ATTR_ICON,
                         self::ATTR_DEFAULT_META_KEYWORDS,
                         self::ATTR_REQUEST_PARAMS,
+                        self::ATTR_ACCESS_OWNER,
                         self::ATTR_ACCESS_READ,
                         self::ATTR_ACCESS_UPDATE,
                         self::ATTR_ACCESS_DELETE,
@@ -522,7 +530,6 @@ public function rules()
                 [
                     [
                         self::ATTR_ROOT,
-                        self::ATTR_ACCESS_OWNER,
                     ],
                     'integer',
                     'integerOnly' => true,
@@ -530,7 +537,6 @@ public function rules()
                 [
                     [
                         self::ATTR_ROOT,
-                        self::ATTR_ACCESS_OWNER,
                         self::ATTR_COLLAPSED,
                         self::ATTR_ICON_TYPE
                     ],
diff --git a/models/Tree.php b/models/Tree.php
index 37225bf..36f5d03 100755
--- a/models/Tree.php
+++ b/models/Tree.php
@@ -38,7 +38,7 @@
  * @property string $default_meta_keywords
  * @property string $default_meta_description
  * @property string $request_params
- * @property int $access_owner
+ * @property string $access_owner
  * @property string $access_domain
  * @property string $access_read
  * @property string $access_update