diff --git a/backend/src/ee/services/pki-acme/pki-acme-service.ts b/backend/src/ee/services/pki-acme/pki-acme-service.ts
index 9ba1c6319..a437d6cd2 100644
--- a/backend/src/ee/services/pki-acme/pki-acme-service.ts
+++ b/backend/src/ee/services/pki-acme/pki-acme-service.ts
@@ -393,7 +393,7 @@ export const pkiAcmeServiceFactory = ({
           break;
         case CertificateRequestStatus.ISSUED:
           newStatus = AcmeOrderStatus.Valid;
-          newCertificateId = orderWithCertificateRequest.certificateRequest.certificateId;
+          newCertificateId = orderWithCertificateRequest.certificateRequest.certificateId ?? undefined;
           break;
         case CertificateRequestStatus.FAILED:
           newStatus = AcmeOrderStatus.Invalid;