diff --git a/Libs/CMS_CORE_Library.dll b/Libs/CMS_CORE_Library.dll
index 6f267ceb..872e464e 100644
Binary files a/Libs/CMS_CORE_Library.dll and b/Libs/CMS_CORE_Library.dll differ
diff --git a/Step.Model/DTOModels/ToolModels/DTOEdgeModel.cs b/Step.Model/DTOModels/ToolModels/DTOEdgeModel.cs
index 6d5b7545..0baae4d0 100644
--- a/Step.Model/DTOModels/ToolModels/DTOEdgeModel.cs
+++ b/Step.Model/DTOModels/ToolModels/DTOEdgeModel.cs
@@ -6,13 +6,10 @@ namespace Step.Model.DTOModels.ToolModels
 {
     public class DTOEdgeModel
     {
-        [Required]
         public double ResidualLife { get; set; }
 
-        [Required]
         public double NominalLife { get; set; }
 
-        [Required]
         public double PreAlmLife { get; set; }
 
         [Required]
diff --git a/Step.Model/DTOModels/ToolModels/DTOSiemensToolModel.cs b/Step.Model/DTOModels/ToolModels/DTOSiemensToolModel.cs
index c4fac741..b811a6f3 100644
--- a/Step.Model/DTOModels/ToolModels/DTOSiemensToolModel.cs
+++ b/Step.Model/DTOModels/ToolModels/DTOSiemensToolModel.cs
@@ -14,7 +14,6 @@ namespace Step.Model.DTOModels.ToolModels
         [Required]
         public int ToolType { get; set; }
 
-        [Required]
         public SIEMENS_LIFE_TYPE LifeType { get; set; }
 
         [Required]