diff --git a/src/GridFieldNestedForm.php b/src/GridFieldNestedForm.php
index cb3015c..9f4fffc 100644
--- a/src/GridFieldNestedForm.php
+++ b/src/GridFieldNestedForm.php
@@ -207,6 +207,9 @@ public function augmentColumns($gridField, &$columns)
 
     public function getColumnContent($gridField, $record, $columnName)
     {
+        if ($gridField->getConfig()->getComponentsByType(GridFieldNestedForm::class)->count() > 1) {
+            throw new Exception('Only one GridFieldNestedForm component allowed per GridField');
+        }
         if ($this->atMaxNestingLevel($gridField)) {
             return '';
         }