diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index 717e541762..80944acc9f 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -2785,17 +2785,26 @@ void SelectMachineDialog::update_show_status()
 
 
     // do ams mapping if no ams result
+    bool clean_ams_mapping = false;
     if (obj_->has_ams() && m_ams_mapping_result.empty()) {
         if (obj_->ams_support_use_ams) {
             if (ams_check->GetValue()) {
                 do_ams_mapping(obj_);
             } else {
-                m_ams_mapping_result.clear();
-                sync_ams_mapping_result(m_ams_mapping_result);
+                clean_ams_mapping = true;
             }
         }
     }
 
+    if (!obj_->has_ams() || !ams_check->GetValue()) {
+        clean_ams_mapping = true;
+    }
+
+    if (clean_ams_mapping) {
+        m_ams_mapping_result.clear();
+        sync_ams_mapping_result(m_ams_mapping_result);
+    }
+
     // reading done
     if (wxGetApp().app_config && wxGetApp().app_config->get("internal_debug").empty()) {
         if (obj_->upgrade_force_upgrade) {