diff --git a/src/WorkFlowCheck.Web/Helpers/AspForDataTypeTagHelper.cs b/src/WorkFlowCheck.Web/Helpers/AspForDataTypeTagHelper.cs
index af9484b..de3375e 100644
--- a/src/WorkFlowCheck.Web/Helpers/AspForDataTypeTagHelper.cs
+++ b/src/WorkFlowCheck.Web/Helpers/AspForDataTypeTagHelper.cs
@@ -17,8 +17,12 @@ namespace WorkFlowCheck.Web.Helpers
 
             string dataType = GetDataTypeString(type);
             output.Attributes.SetAttribute("data-type", dataType);
+
+            // 🔥 EZ HIÁNYZIK → Rakd be!
+            output.Attributes.RemoveAll("asp-for-datatype");
         }
 
+
         private string GetDataTypeString(Type type)
         {
             // Nullable<T> esetén nyerjük ki az alaptípust
diff --git a/src/WorkFlowCheck.Web/Pages/CheckList/CheckListHeader/CheckListHeaderEditPage.cshtml b/src/WorkFlowCheck.Web/Pages/CheckList/CheckListHeader/CheckListHeaderEditPage.cshtml
index 47e2a92..78f9c11 100644
--- a/src/WorkFlowCheck.Web/Pages/CheckList/CheckListHeader/CheckListHeaderEditPage.cshtml
+++ b/src/WorkFlowCheck.Web/Pages/CheckList/CheckListHeader/CheckListHeaderEditPage.cshtml
@@ -33,23 +33,23 @@
             <div class="tab-pane fade show active" id="general" role="tabpanel">
                 <form method="post" id="CheckListHeaderForm">
                     <meta name="csrf-token" content="@Antiforgery.GetAndStoreTokens(HttpContext).RequestToken" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.Id" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.IsEditable" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.IsStorno" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.GuidNumber" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.CheckListTemplateHeaderId" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.UserId" />
-                    <input type="hidden" name="CheckListHeaderDTO.DateExecution" value="@Model.CheckListHeaderDTO.DateExecution.ToString("yyyy-MM-dd")" />
-                    <input type="hidden" asp-for="CheckListHeaderDTO.AcceptUserId" />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.Id" data-type="int" />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.IsEditable" data-type="bool" />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.IsStorno" data-type="bool" />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.GuidNumber"  />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.CheckListTemplateHeaderId" data-type="int" />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.UserId" data-type="int" />
+                    <input type="hidden" name="CheckListHeaderDTO.DateExecution" value="@Model.CheckListHeaderDTO.DateExecution.ToString("yyyy-MM-dd")"  />
+                    <input type="hidden" asp-for="CheckListHeaderDTO.AcceptUserId" data-type="int" />
                     <div class="row">
                         <div class="col-md-3">
                             <label asp-for="CheckListHeaderDTO.DocumentNumber"></label>
-                            <input asp-for="CheckListHeaderDTO.DocumentNumber" class="form-control" readonly />
+                            <input asp-for="CheckListHeaderDTO.DocumentNumber" class="form-control" readonly  />
                             <span asp-validation-for="CheckListHeaderDTO.DocumentNumber" class="text-danger"></span>
                         </div>
                         <div class="col-md-3">
                             <label asp-for="CheckListHeaderDTO.CheckStatus"></label>
-                            <select asp-for="CheckListHeaderDTO.CheckStatus" class="form-control" asp-items="Model.CheckStatus" readonly></select>
+                            <select asp-for="CheckListHeaderDTO.CheckStatus" class="form-control" asp-items="Model.CheckStatus" readonly data-type="int"></select>
                             <span asp-validation-for="CheckListHeaderDTO.CheckStatus" class="text-danger"></span>
                         </div>
                     </div>
diff --git a/src/WorkFlowCheck.Web/Pages/_ViewImports.cshtml b/src/WorkFlowCheck.Web/Pages/_ViewImports.cshtml
index 30510b3..e0356cc 100644
--- a/src/WorkFlowCheck.Web/Pages/_ViewImports.cshtml
+++ b/src/WorkFlowCheck.Web/Pages/_ViewImports.cshtml
@@ -2,3 +2,4 @@
 @using WorkFlowCheck.Web.Helpers
 @namespace WorkFlowCheck.Web.Pages
 @addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
+@addTagHelper *, WorkFlowCheck.Web.Helpers