diff --git a/CarParkValidationAPI/Controllers/ConcessionValidationController.cs b/CarParkValidationAPI/Controllers/ConcessionValidationController.cs
index b483dc3..13bb118 100644
--- a/CarParkValidationAPI/Controllers/ConcessionValidationController.cs
+++ b/CarParkValidationAPI/Controllers/ConcessionValidationController.cs
@@ -56,9 +56,9 @@ namespace CarParkValidationAPI.Controllers
         }
 
         [HttpGet("[action]")]
-        public async Task<IActionResult> CheckConcessionValidationByStaff(string staffLinkNo, string concessionCard, DateTime currentDate)
+        public async Task<IActionResult> CheckConcessionValidationByStaff(string staffLinkNo, string concessionCard, DateTime currentDate, int id)
         {
-            var retval = await _concessionValidation.CheckConcessionValidationStaffLinkNoAsync(staffLinkNo, concessionCard, currentDate);
+            var retval = await _concessionValidation.CheckConcessionValidationStaffLinkNoAsync(staffLinkNo, concessionCard, currentDate, id);
             return Ok(retval);
         }
 
diff --git a/CarParkValidationAPI/Interface/IConcessionValidation.cs b/CarParkValidationAPI/Interface/IConcessionValidation.cs
index dd81f90..2357fef 100644
--- a/CarParkValidationAPI/Interface/IConcessionValidation.cs
+++ b/CarParkValidationAPI/Interface/IConcessionValidation.cs
@@ -12,7 +12,7 @@ namespace CarParkValidationAPI.Interface
     {
         Task<ResultModel<List<ConcessionValidationExtDto>>> LoadConcessionValidationAsync(bool OnlyActive);
         Task<ResultModel<List<ConcessionValidationExtDto>>> LoadConcessionValidationStaffLinkNoAsync(string staffLinkNo, DateTime currentDate);
-        Task<ResultModel<int>> CheckConcessionValidationStaffLinkNoAsync(string staffLinkNo, string concessionCard, DateTime currentDate);
+        Task<ResultModel<int>> CheckConcessionValidationStaffLinkNoAsync(string staffLinkNo, string concessionCard, DateTime currentDate, int id);
         Task<ResultModel<int>> SaveConcessionValidationAsync(ConcessionValidationDto item);
         Task<ResultModel<ConcessionValidationDto>> LoadConcessionValidationByIdAsync(int id);
         Task<ResultModel<bool>> DeleteConcessionValidationAsync(int id);
diff --git a/CarParkValidationAPI/Repository/ConcessionValidationRepository.cs b/CarParkValidationAPI/Repository/ConcessionValidationRepository.cs
index 9e2e581..beedd6f 100644
--- a/CarParkValidationAPI/Repository/ConcessionValidationRepository.cs
+++ b/CarParkValidationAPI/Repository/ConcessionValidationRepository.cs
@@ -162,16 +162,17 @@ namespace CarParkValidationAPI.Repository
 			};
         }
 
-        public async Task<ResultModel<int>> CheckConcessionValidationStaffLinkNoAsync(string staffLinkNo, string concessionCard, DateTime currentDate)
+        public async Task<ResultModel<int>> CheckConcessionValidationStaffLinkNoAsync(string staffLinkNo, string concessionCard, DateTime currentDate, int id)
         {
             int statuscode = 1;
             int result = 1;
+			int number = id < 1 ? 0 : 1; // if insert check > 0 . if modify > 1 
             string message = "warning you already add concession card on this date!";
             try
             {
 				var anyRecord = await _context.SelectCheckConcessionValidationAsync(currentDate.ToLocalTime().Date, concessionCard, staffLinkNo);
                   
-                if (anyRecord.Count > 1)
+                if (anyRecord.Count > number)
                 {
                     result = -1;
                 }