diff --git a/src/Sonarr.Api.V3/ImportLists/ImportListExclusionController.cs b/src/Sonarr.Api.V3/ImportLists/ImportListExclusionController.cs
index 58742ad79..43f55a259 100644
--- a/src/Sonarr.Api.V3/ImportLists/ImportListExclusionController.cs
+++ b/src/Sonarr.Api.V3/ImportLists/ImportListExclusionController.cs
@@ -20,7 +20,10 @@ namespace Sonarr.Api.V3.ImportLists
         {
             _importListExclusionService = importListExclusionService;
 
-            SharedValidator.RuleFor(c => c.TvdbId).NotEmpty().SetValidator(importListExclusionExistsValidator);
+            SharedValidator.RuleFor(c => c.TvdbId).Cascade(CascadeMode.Stop)
+                .NotEmpty()
+                .SetValidator(importListExclusionExistsValidator);
+
             SharedValidator.RuleFor(c => c.Title).NotEmpty();
         }
 
diff --git a/src/NzbDrone.Core/ImportLists/Exclusions/ImportListExclusionExistsValidator.cs b/src/Sonarr.Api.V3/ImportLists/ImportListExclusionExistsValidator.cs
similarity index 65%
rename from src/NzbDrone.Core/ImportLists/Exclusions/ImportListExclusionExistsValidator.cs
rename to src/Sonarr.Api.V3/ImportLists/ImportListExclusionExistsValidator.cs
index 88b4c0026..0196f169b 100644
--- a/src/NzbDrone.Core/ImportLists/Exclusions/ImportListExclusionExistsValidator.cs
+++ b/src/Sonarr.Api.V3/ImportLists/ImportListExclusionExistsValidator.cs
@@ -1,6 +1,7 @@
 using FluentValidation.Validators;
+using NzbDrone.Core.ImportLists.Exclusions;
 
-namespace NzbDrone.Core.ImportLists.Exclusions
+namespace Sonarr.Api.V3.ImportLists
 {
     public class ImportListExclusionExistsValidator : PropertyValidator
     {
@@ -20,7 +21,12 @@ namespace NzbDrone.Core.ImportLists.Exclusions
                 return true;
             }
 
-            return !_importListExclusionService.All().Exists(s => s.TvdbId == (int)context.PropertyValue);
+            if (context.InstanceToValidate is not ImportListExclusionResource listExclusionResource)
+            {
+                return true;
+            }
+
+            return !_importListExclusionService.All().Exists(v => v.TvdbId == (int)context.PropertyValue && v.Id != listExclusionResource.Id);
         }
     }
 }