diff --git a/TwinpackCore/Core/TwinpackService.cs b/TwinpackCore/Core/TwinpackService.cs
index 7790b12..eb8ccdc 100644
--- a/TwinpackCore/Core/TwinpackService.cs
+++ b/TwinpackCore/Core/TwinpackService.cs
@@ -569,6 +569,8 @@ private async Task<List<PackageItem>> AffectedPackagesAsync(List<PackageItem> pa
             {
                 if (package.Package == null || package.PackageVersion == null || package.PackageServer == null)
                 {
+                    package.PackageVersion = null;
+                    package.PackageServer = null;
                     var resolvedPackage = await _packageServers.FetchPackageAsync(package.PackageServer, package.ProjectName, package.PlcName, package.Config, includeMetadata: true, _automationInterface, cancellationToken);
                     package.Package ??= resolvedPackage.Package;
                     package.PackageVersion ??= resolvedPackage.PackageVersion;