Merge pull request #1365 from DFE-Digital/hotfix/179198-fix-caching-i…

…ssue

Fixed an issue where when the cache is expired the page throws an exception

ConcernsCaseWork/ConcernsCaseWork/Pages/Case/Management/Index.cshtml.cs

@@ -5,6 +5,7 @@
 using ConcernsCaseWork.Models;
 using ConcernsCaseWork.Models.CaseActions;
 using ConcernsCaseWork.Pages.Base;
+using ConcernsCaseWork.Redis.Models;
 using ConcernsCaseWork.Redis.Users;
 using ConcernsCaseWork.Service.Permissions;
 using ConcernsCaseWork.Services.Actions;
@@ -245,14 +246,18 @@ private async Task<bool> IsCaseDeletable(long caseId)
 
 		private async Task UpdateCacheService(CaseModel model)
 		{
-			var userState = await _cachedService.GetData(GetUserName());
-			var trustUkPrn = userState.TrustUkPrn;
-			if (trustUkPrn == null)
+			var userName = GetUserName();
+
+			var userState = await _cachedService.GetData(userName);
+
+			if (userState?.TrustUkPrn != null)
 			{
-				userState.TrustUkPrn = model.TrustUkPrn;
-				await _cachedService.StoreData(userState.UserName, userState);
+				return;
 			}
-
+
+			if (userState != null)
+					userState.TrustUkPrn = model.TrustUkPrn;
+				await _cachedService.StoreData(userName, userState);
 		}
 
 		public async Task<IActionResult> OnGetPaginatedActiveCases(string trustUkPrn, int pageNumber)