add modified the check logic if insert > 0 else > 1.

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;
                 }