diff --git a/src/controllers/08-credit-note-controller.ts b/src/controllers/08-credit-note-controller.ts
index a6c977b..4374f96 100644
--- a/src/controllers/08-credit-note-controller.ts
+++ b/src/controllers/08-credit-note-controller.ts
@@ -204,6 +204,7 @@ export class CreditNoteController extends Controller {
   async createCreditNote(@Request() req: RequestWithUser, @Body() body: CreditNoteCreate) {
     const requestWork = await prisma.requestWork.findMany({
       where: {
+        creditNote: null,
         request: {
           quotation: {
             id: body.quotationId,
@@ -310,6 +311,7 @@ export class CreditNoteController extends Controller {
 
     const requestWork = await prisma.requestWork.findMany({
       where: {
+        OR: [{ creditNote: null }, { creditNoteId }],
         request: {
           quotation: {
             id: body.quotationId,