diff --git a/Services/CandidateService.cs b/Services/CandidateService.cs
index ae41bb6..17ec119 100644
--- a/Services/CandidateService.cs
+++ b/Services/CandidateService.cs
@@ -1259,9 +1259,9 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
             if (candidate == null)
                 throw new Exception(GlobalMessages.ExamNotFound);
 
-            string profileImgId = candidate.ProfileImg.Id.ToString();
             if (candidate.ProfileImg != null)
             {
+                string profileImgId = candidate.ProfileImg.Id.ToString();
                 //ลบ FK ในเบสก่อนแล้วค่อยไปลบที่ minIo
                 candidate.ProfileImg = null;
                 await _context.SaveChangesAsync();
@@ -1286,9 +1286,9 @@ namespace BMA.EHR.Recurit.Exam.Service.Services
             if (candidate == null)
                 throw new Exception(GlobalMessages.ExamNotFound);
 
-            string profileImgId = candidate.ProfileImg.Id.ToString();
             if (candidate.ProfileImg != null)
             {
+                string profileImgId = candidate.ProfileImg.Id.ToString();
                 //ลบ FK ในเบสก่อนแล้วค่อยไปลบที่ minIo
                 candidate.ProfileImg = null;
                 await _context.SaveChangesAsync();