diff --git a/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/AddAllReleasesToOldVersions.cs b/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/AddAllReleasesToOldVersions.cs
index 56d182a2..7444caa7 100644
--- a/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/AddAllReleasesToOldVersions.cs
+++ b/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/AddAllReleasesToOldVersions.cs
@@ -1,6 +1,5 @@
 using System.Xml.Linq;
 using Noggog;
-using NuGet.Versioning;
 
 namespace Synthesis.Bethesda.Execution.Patchers.Git.ModifyProject;
 
@@ -11,13 +10,13 @@ public class AddAllReleasesToOldVersions
     public void Add(
         XElement proj, 
         Version? curSynthVersion, 
-        NuGetVersion targetMutagenVersion, 
-        NuGetVersion? targetSynthVersion)
+        Version targetMutagenVersion, 
+        Version? targetSynthVersion)
     {
         if (targetSynthVersion != null
             && curSynthVersion != null
             && curSynthVersion < IntroducingSynthesisVersion
-            && targetSynthVersion.Version >= IntroducingSynthesisVersion)
+            && targetSynthVersion >= IntroducingSynthesisVersion)
         {
             foreach (var group in proj.Elements("ItemGroup"))
             {
diff --git a/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/ModifyRunnerProjects.cs b/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/ModifyRunnerProjects.cs
index 6ee53b06..8896f048 100644
--- a/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/ModifyRunnerProjects.cs
+++ b/Synthesis.Bethesda.Execution/Patchers/Git/ModifyProject/ModifyRunnerProjects.cs
@@ -77,14 +77,7 @@ public void Modify(
             if (index == -1) return version;
             return version.Substring(0, index);
         }
-
-        if (versions.Mutagen == null)
-        {
-            throw new ArgumentException("Target mutagen version null");
-        }
         
-        var targetMutagenNugetVersion = NuGetVersion.Parse(versions.Mutagen);
-        var targetSynthesisNugetVersion = versions.Synthesis != null ? NuGetVersion.Parse(versions.Synthesis) : default;
         var trimmedMutagenVersion = TrimVersion(versions.Mutagen);
         var trimmedSynthesisVersion = TrimVersion(versions.Synthesis);
         foreach (var subProj in _availableProjectsRetriever.Get(solutionPath))
@@ -112,8 +105,11 @@ public void Modify(
             {
                 _removeProject.Remove(projXml, "Newtonsoft.Json");
             }
-            
-            _addAllReleasesToOldVersions.Add(projXml, synthVersion, targetMutagenNugetVersion, targetSynthesisNugetVersion);
+
+            if (targetMutaVersion != null && targetSynthesisVersion != null)
+            {
+                _addAllReleasesToOldVersions.Add(projXml, synthVersion, targetMutaVersion, targetSynthesisVersion);
+            }
 
             if (targetMutaVersion >= NamespaceMutaVersion
                 && mutaVersion < NamespaceMutaVersion)