diff --git a/Makefile b/Makefile
index 9b8e9d4..5d91324 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+repair:
+	php backend/scripts/repair.php
+
 setup:
 	php backend/scripts/setup.php
 
diff --git a/backend/classes/controller/FingerprintDeleteController.php b/backend/classes/controller/FingerprintDeleteController.php
index 31ee4f0..4691324 100644
--- a/backend/classes/controller/FingerprintDeleteController.php
+++ b/backend/classes/controller/FingerprintDeleteController.php
@@ -24,8 +24,15 @@ final class FingerprintDeleteController extends AbstractController
 		}
 
 		try {
-			$fingerprint = new Fingerprint($this->fingerprintId);
+			$db = new MySqlDatabase();
+			$db->startTransaction();
+
+			$fingerprint = new Fingerprint($this->fingerprintId, $db);
+			$qrCode = new QrCode($fingerprint->getFingerprintId(), $fingerprint->getFingerprint());
 			$fingerprint->Delete();
+			$qrCode->delete();
+
+			$db->commit();
 
 			$this->response = new ApiJsonResponse();
 		} catch (Throwable $e) {
diff --git a/backend/classes/core/QrCode.php b/backend/classes/core/QrCode.php
index 4e41c9e..2e356fd 100644
--- a/backend/classes/core/QrCode.php
+++ b/backend/classes/core/QrCode.php
@@ -24,11 +24,7 @@ final class QrCode
 
         $returnCode = 0;
 
-        $path = substr(Setting::PATH_QR_CODES, -1) === '/'
-            ? Setting::PATH_QR_CODES
-            : Setting::PATH_QR_CODES . '/';
-
-        $filename = $path . $this->fingerprintId . '.svg';
+		$filename = $this->getFilePath();
 
         passthru(
             sprintf('mv %s %s', $this->temporaryFilename, $filename),
@@ -42,6 +38,19 @@ final class QrCode
         }
     }
 
+    public function delete(): void
+	{
+		$filepath = $this->getFilePath();
+
+		if (!is_file($filepath)) {
+			throw new QrCodeException(sprintf('Qr code file %s not found!', $filepath));
+		}
+
+		if (!unlink($filepath)) {
+			throw new QrCodeException('Couldn\'t delete %s!', $filepath);
+		}
+	}
+
     public function generate(): bool
     {
         $returnCode = 0;
@@ -58,10 +67,24 @@ final class QrCode
         return !(bool)$returnCode;
     }
 
+    public function hasFile(): bool
+	{
+		return is_file($this->getFilePath());
+	}
+
     private function generateTemporaryFilename(): string
     {
         $hash = hash('md5', (new DateTime())->format('U') . $this->fingerprint);
 
         return sprintf('%s.svg', $hash);
     }
+
+    private function getFilePath(): string
+	{
+		$path = substr(Setting::PATH_QR_CODES, -1) === '/'
+			? Setting::PATH_QR_CODES
+			: Setting::PATH_QR_CODES . '/';
+
+		return $path . $this->fingerprintId . '.svg';
+	}
 }
\ No newline at end of file
diff --git a/backend/scripts/repair.php b/backend/scripts/repair.php
new file mode 100644
index 0000000..9bca3eb
--- /dev/null
+++ b/backend/scripts/repair.php
@@ -0,0 +1,31 @@
+<?php
+
+require 'backend/classes/core/Autoloader.php';
+
+$autoloader = new Autoloader();
+
+echo 'Checking for missing qr codes...' . PHP_EOL;
+
+$db = new MySqlDatabase();
+
+$countForMissing = 0;
+
+foreach ($db->Select(Fingerprint::class, [Fingerprint::FIELD_ID]) as $record) {
+	$fingerprint = new Fingerprint((int)$record[Fingerprint::FIELD_ID], $db);
+
+	$qrCode = new QrCode($fingerprint->getFingerprintId(), $fingerprint->getFingerprint());
+
+	if (!$qrCode->hasFile()) {
+		$countForMissing++;
+
+		$qrCode->generate();
+		$qrCode->save();
+
+		echo sprintf("\t=> Missing QR code for fingerprint %d generated.\n", $fingerprint->getFingerprintId());
+	}
+}
+
+echo $countForMissing === 0
+	? 'No missing QR codes found.' . PHP_EOL
+	: sprintf('%d missing QR code(s) fixed.', $countForMissing) . PHP_EOL;
+