diff --git a/lib/Controller/ApiController.php b/lib/Controller/ApiController.php
index 6b54111fa..7d07c6e03 100644
--- a/lib/Controller/ApiController.php
+++ b/lib/Controller/ApiController.php
@@ -1270,7 +1270,7 @@ public function getSubmissions(int $formId, ?string $query = null, ?int $limit =
 		$submissions = array_map(function (array $submission) use ($questions) {
 			if (!empty($submission['answers'])) {
 				$submission['answers'] = array_map(function (array $answer) use ($questions) {
-					$name = $questions[$answer['questionId']]['name'];
+					$name = $questions[$answer['questionId']]['name'] ?? null;
 					if ($name) {
 						$answer['questionName'] = $name;
 					}