diff --git a/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php b/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php
index f8f4038..5780a4c 100644
--- a/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php
+++ b/src/Plugin/Field/FieldWidget/InlineEntityFormSimple.php
@@ -113,6 +113,10 @@ class InlineEntityFormSimple extends InlineEntityFormBase {
           }
         }
       }
+    } else {
+      if (isset($element['add_more'])) {
+        $element['add_more']['#limit_validation_errors'] = array();
+      }
     }
 
     return $element;