diff --git a/tools/projmgr/src/ProjMgrWorker.cpp b/tools/projmgr/src/ProjMgrWorker.cpp
index f9bdfd1d0..d6a843532 100644
--- a/tools/projmgr/src/ProjMgrWorker.cpp
+++ b/tools/projmgr/src/ProjMgrWorker.cpp
@@ -572,14 +572,28 @@ bool ProjMgrWorker::LoadPacks(ContextItem& context) {
   }
   // Filter context specific packs
   set<string> selectedPacks;
+  map<string, set<string>> selectedPackVersions;
   const bool allOrLatest = (m_loadPacksPolicy == LoadPacksPolicy::ALL) || (m_loadPacksPolicy == LoadPacksPolicy::LATEST);
   for (const auto& pack : m_loadedPacks) {
     if (context.pdscFiles.find(pack->GetPackageFileName()) != context.pdscFiles.end()) {
       selectedPacks.insert(pack->GetPackageID());
+      selectedPackVersions[pack->GetPackageID(false)].insert(pack->GetVersionString());
+    }
+  }
+  // check if multiple versions are selected
+  for (const auto& [pack, versions] : selectedPackVersions) {
+    if (versions.size() > 1) {
+      string msg = "selected multiple versions of pack '" + pack + "':";
+      for (const auto& version : versions) {
+        msg += " '" + version + "',";
+      }
+      msg.pop_back();
+      msg += "\nReview pack requirements";
+      ProjMgrLogger::Get().Warn(msg, context.name);
     }
   }
   RtePackageFilter filter;
-   // use all packs is enabled by default, by default policy it should be disabled if selectedPacks is not empty
+  // use all packs is enabled by default, by default policy it should be disabled if selectedPacks is not empty
   filter.SetUseAllPacks(allOrLatest || selectedPacks.empty());
   filter.SetSelectedPackages(selectedPacks);
   context.rteActiveTarget->SetPackageFilter(filter);
diff --git a/tools/projmgr/test/data/TestSolution/pack_multiple_versions.csolution.yml b/tools/projmgr/test/data/TestSolution/pack_multiple_versions.csolution.yml
new file mode 100644
index 000000000..382be2e4b
--- /dev/null
+++ b/tools/projmgr/test/data/TestSolution/pack_multiple_versions.csolution.yml
@@ -0,0 +1,14 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/Open-CMSIS-Pack/devtools/main/tools/projmgr/schemas/csolution.schema.json
+
+solution:
+  target-types:
+    - type: CM0
+      device: RteTest_ARMCM0
+
+  packs:
+    - pack: ARM::RteTest_DFP@0.1.1
+    - pack: ARM::RteTest_DFP
+      path: ../SolutionSpecificPack # 0.2.0
+
+  projects:
+    - project: pack_path.cproject.yml
diff --git a/tools/projmgr/test/src/ProjMgrUnitTests.cpp b/tools/projmgr/test/src/ProjMgrUnitTests.cpp
index 370e40cda..0a8c75473 100644
--- a/tools/projmgr/test/src/ProjMgrUnitTests.cpp
+++ b/tools/projmgr/test/src/ProjMgrUnitTests.cpp
@@ -3778,6 +3778,21 @@ TEST_F(ProjMgrUnitTests, RunProjMgrSolution_Local_Pack_File_Not_Found) {
   EXPECT_TRUE(regex_search(errStr, regex(errExpected)));
 }
 
+TEST_F(ProjMgrUnitTests, MultiplePackVersions) {
+  char* argv[5];
+  StdStreamRedirect streamRedirect;
+  const string expected = "warning csolution: selected multiple versions of pack 'ARM::RteTest_DFP': '0.1.1+metadata', '0.2.0'\nReview pack requirements";
+  const string& csolution = testinput_folder + "/TestSolution/pack_multiple_versions.csolution.yml";
+  argv[1] = (char*)"convert";
+  argv[2] = (char*)csolution.c_str();
+  argv[3] = (char*)"-o";
+  argv[4] = (char*)testoutput_folder.c_str();
+  EXPECT_EQ(0, RunProjMgr(5, argv, 0));
+
+  auto errStr = streamRedirect.GetErrorString();
+  EXPECT_NE(string::npos, errStr.find(expected));
+}
+
 TEST_F(ProjMgrUnitTests, RunProjMgrSolution_List_Board_Pack) {
   char* argv[7];
   const string& csolution = testinput_folder + "/TestSolution/test_list_board_package.csolution.yml";