diff --git a/Areas/Admin/Controllers/ProductController.cs b/Areas/Admin/Controllers/ProductController.cs
index 1f3c32a..73ef5e5 100644
--- a/Areas/Admin/Controllers/ProductController.cs
+++ b/Areas/Admin/Controllers/ProductController.cs
@@ -74,7 +74,7 @@ namespace pwt_0x01_ng.Areas.Admin.Controllers
 				}
 				foreach (var s_item in s)
 				{
-					var prodpls = await dbctx.Product.Where(p_item => p_item.id == s_item.prod_id).FirstOrDefaultAsync();
+					var prodpls = await dbctx.Product.Where(p_item => p_item.id == s_item.similar_prod_id).FirstOrDefaultAsync();
 					if(prodpls != null){
 						for (int i = 0; i < similar.Count; i++)
 						{
@@ -124,13 +124,15 @@ namespace pwt_0x01_ng.Areas.Admin.Controllers
 						if(similar.Count > 0){
 							foreach (var prod in similar)
 							{
+								Similar s = dbctx.Similar.Where(p_item => p_item.prod_id == item.id && p_item.similar_prod_id == prod.id).FirstOrDefault();
 								if(prod.Selected){
-									Similar s = new Similar();
-									s.prod_id = item.id;
-									s.similar_prod_id = prod.id;
-									var res = dbctx.Similar.Add(s);
+									if (s == null) {
+										s = new Similar();
+										s.prod_id = item.id;
+										s.similar_prod_id = prod.id;
+										dbctx.Similar.Add(s);
+									}
 								} else {
-									Similar s = dbctx.Similar.Where(p_item => p_item.prod_id == item.id && p_item.similar_prod_id != prod.id).FirstOrDefault();
 									if (s != null) {
 										dbctx.Similar.Remove(s);
 									}
diff --git a/Areas/Admin/Views/Product/edit-create_part.cshtml b/Areas/Admin/Views/Product/edit-create_part.cshtml
index ecaeffb..4050b72 100644
--- a/Areas/Admin/Views/Product/edit-create_part.cshtml
+++ b/Areas/Admin/Views/Product/edit-create_part.cshtml
@@ -60,6 +60,9 @@
 									<input asp-for="@Model.Similar[i].Selected" type="checkbox">
 									<input asp-for="@Model.Similar[i].id" type="hidden">
 								}
+							} else {
+								<input asp-for="@Model.Similar[i].Selected" type="checkbox" hidden>
+								<input asp-for="@Model.Similar[i].id" type="hidden">
 							}
 						}
 					</div>