src/Hotline.Api/Controllers/KnowledgeController.cs

@@ -288,7 +288,7 @@ namespace Hotline.Api.Controllers
             var kn = await _knowledgeDomainService.OffShelfAsync(dto, HttpContext.RequestAborted);
 
             await _knowledgeDomainService.AddKnowledgeApproveAsync(EKnowledgeApproveType.OffShelf,
-                kn, null, HttpContext.RequestAborted);
+                kn, dto.Opinion, HttpContext.RequestAborted);
         }
 
         /// <summary>