set used_in_forms $fom Array

Rewrite/Magento/Eav/Model/Attribute.php

@@ -9,6 +9,20 @@ namespace Baldarian\AdminReorder\Rewrite\Magento\Eav\Model;
 
 class Attribute extends \Magento\Eav\Model\Attribute
 {
+    /**
+     * Return forms in which the attribute
+     *
+     * @return array
+     */
+    public function getUsedInForms()
+    {
+        $forms = $this->getData('used_in_forms');
+        if ($forms === null) {
+            $forms = [];
+            $this->setData('used_in_forms', $forms);
+        }
 
+        return $forms;
+    }
 }
 

composer.json

@@ -3,13 +3,14 @@
     "description": "Fix reorder error from admin",
     "type": "magento2-module",
     "license": "GPL-3.0",
+    "version": "1.0.0",
     "authors": [
         {
             "name": "Mage2Gen",
             "email": "info@mage2gen.com"
         },
         {
-            "name": "\u00c1ngel \u00c1ngel Rodr\u00edguez",
+            "name": "Àngel Rodríguez",
             "email": "angel.r.baldarian@gmail.com"
         }
     ],