diff --git a/Modules/AdministratorModule.cs b/Modules/AdministratorModule.cs
index 7c2f460..d7d2095 100644
--- a/Modules/AdministratorModule.cs
+++ b/Modules/AdministratorModule.cs
@@ -158,7 +158,9 @@ internal static int CalculateLogSkipCount(int page, int pageSize)
     internal static bool TryParseOwnerId(string? value, out ulong ownerId)
     {
         ownerId = 0;
-        return !string.IsNullOrWhiteSpace(value) && ulong.TryParse(value, out ownerId);
+        return !string.IsNullOrWhiteSpace(value) &&
+               ulong.TryParse(value, out ownerId) &&
+               ownerId > 0;
     }
 
     internal static IReadOnlyList<string> BuildLogMessages(IEnumerable<string> lines)
diff --git a/Morpheus.Tests/AdministratorModuleTests.cs b/Morpheus.Tests/AdministratorModuleTests.cs
index 74c8d42..8e9d7d9 100644
--- a/Morpheus.Tests/AdministratorModuleTests.cs
+++ b/Morpheus.Tests/AdministratorModuleTests.cs
@@ -8,6 +8,7 @@ public class AdministratorModuleTests
     [InlineData(null)]
     [InlineData("")]
     [InlineData("   ")]
+    [InlineData("0")]
     [InlineData("not-a-user-id")]
     public void TryParseOwnerId_RejectsMissingOrInvalidValues(string? value)
     {