diff --git a/Exception/ModelFormInvalidException.php b/Exception/ModelFormInvalidException.php
new file mode 100644
index 0000000..1419897
--- /dev/null
+++ b/Exception/ModelFormInvalidException.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace HandcraftedInTheAlps\Bundle\SuluResourceBundle\Exception;
+
+use RuntimeException;
+use Symfony\Component\Form\FormError;
+use Symfony\Component\Form\FormInterface;
+
+class ModelFormInvalidException extends RuntimeException
+{
+    /**
+     * @var FormInterface<mixed>
+     */
+    protected $form;
+
+    /**
+     * @param FormInterface<mixed> $form
+     */
+    public function __construct(FormInterface $form)
+    {
+        $this->form = $form;
+
+        parent::__construct(
+            sprintf(
+                'Invalid form data for "%s" on form "%s": ' . json_encode($this->getErrors(), JSON_PRETTY_PRINT),
+                \get_class($this->form->getData()),
+                \get_class($this->form)
+            )
+        );
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function toArray(): array
+    {
+        $message = '';
+
+        foreach ($this->getErrors() as $fieldName => $field) {
+            $message .= ucfirst($fieldName) . ': ' . implode(',', $field['messages']) . PHP_EOL;
+        }
+
+        return [
+            'code' => $this->code,
+            'message' => trim($message),
+            'errors' => $this->getErrors(),
+        ];
+    }
+
+    /**
+     * @return FormInterface<mixed>
+     */
+    public function getForm(): FormInterface
+    {
+        return $this->form;
+    }
+
+    /**
+     * @return mixed[]
+     */
+    public function getErrors(): array
+    {
+        $errors = [];
+
+        /** @var FormError $error */
+        foreach ($this->form->getErrors(true) as $key => $error) {
+            $origin = $error->getOrigin();
+
+            if (null === $origin) {
+                continue;
+            }
+
+            $field = $origin->getName();
+
+            if (!isset($errors[$field])) {
+                $data = $origin->getData();
+                $viewData = $origin->getViewData();
+
+                $errors[$field] = [
+                    'value' => is_scalar($data) ? $data : $viewData,
+                    'messages' => [],
+                ];
+            }
+
+            $errors[$field]['messages'][] = $error->getMessage();
+        }
+
+        return $errors;
+    }
+}