diff --git a/TwinpackCore/Core/TwinpackService.cs b/TwinpackCore/Core/TwinpackService.cs
index eb8ccdc..98ec3d7 100644
--- a/TwinpackCore/Core/TwinpackService.cs
+++ b/TwinpackCore/Core/TwinpackService.cs
@@ -569,6 +569,7 @@ private async Task<List<PackageItem>> AffectedPackagesAsync(List<PackageItem> pa
             {
                 if (package.Package == null || package.PackageVersion == null || package.PackageServer == null)
                 {
+                    package.Package = null;
                     package.PackageVersion = null;
                     package.PackageServer = null;
                     var resolvedPackage = await _packageServers.FetchPackageAsync(package.PackageServer, package.ProjectName, package.PlcName, package.Config, includeMetadata: true, _automationInterface, cancellationToken);
diff --git a/TwinpackTests/TwinpackServiceTest.cs b/TwinpackTests/TwinpackServiceTest.cs
index f1b1b08..c77d5a8 100644
--- a/TwinpackTests/TwinpackServiceTest.cs
+++ b/TwinpackTests/TwinpackServiceTest.cs
@@ -1387,5 +1387,25 @@ public async Task AffectedPackages_PreferPassedPackageItems()
             Assert.AreEqual("ZPlatform", platformPackage.PackageVersion.Name);
             Assert.AreEqual("main", platformPackage.PackageVersion.Branch);
         }
+
+        [TestMethod]
+        public async Task AffectedPackages_IgnoreNotAvailableDependencies()
+        {
+            var twinpack = BuildMultiBranchDependencies();
+
+            var packages = await twinpack.AffectedPackagesAsync(
+                new List<PackageItem>()
+                {
+                    new PackageItem()
+                    { 
+                        Config = new ConfigPlcPackage { Name = "NotExisting", Version = "1.5.0.1", Branch = "main" },
+                        Package = new PackageGetResponse { Name = "NotExisting" },
+                        PackageVersion = new PackageVersionGetResponse { Name = "NotExisting", Version = "1.5.0.1", Branch = "main" },
+                        PackageServer = null
+                    },
+                });
+
+            Assert.AreEqual(0, packages.Count());
+        }
     }
 }