diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index e6e6760c3..fae151ca4 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -5951,6 +5951,42 @@ AmsTray MachineObject::parse_vt_tray(json vtray)
     return vt_tray;
 }
 
+bool MachineObject::contains_tray(const std::string &ams_id, const std::string &tray_id) const
+{
+    if (ams_id != VIRTUAL_AMS_MAIN_ID_STR && ams_id != VIRTUAL_AMS_DEPUTY_ID_STR) {
+        auto ams_iter = amsList.find(ams_id);
+        if (ams_iter != amsList.end()) {
+            auto tray_iter = ams_iter->second->trayList.find(tray_id);
+            if (tray_iter != ams_iter->second->trayList.end()) { return true;}
+        }
+    } else {
+        for (const auto& tray : vt_slot) {
+            if (tray.id == tray_id) { return true; }
+        }
+    }
+
+    return false;
+}
+
+AmsTray MachineObject::get_tray(const std::string &ams_id, const std::string &tray_id) const
+{
+    if (ams_id != VIRTUAL_AMS_MAIN_ID_STR && ams_id != VIRTUAL_AMS_DEPUTY_ID_STR) {
+        auto ams_iter = amsList.find(ams_id);
+        if (ams_iter != amsList.end()) {
+            auto tray_iter = ams_iter->second->trayList.find(tray_id);
+            if (tray_iter != ams_iter->second->trayList.end()) { return *tray_iter->second; }
+        }
+    }
+    else {
+        for (const auto &tray : vt_slot) {
+            if (tray.id == tray_id) { return tray; }
+        }
+    }
+
+    assert(0);/*use contains_tray() check first*/
+    return AmsTray(tray_id);
+}
+
 bool MachineObject::check_enable_np(const json& print) const
 {
     if (print.contains("cfg") && print.contains("fun") && print.contains("aux") && print.contains("stat"))
diff --git a/src/slic3r/GUI/DeviceManager.hpp b/src/slic3r/GUI/DeviceManager.hpp
index 7c69fe989..dc48b51a9 100644
--- a/src/slic3r/GUI/DeviceManager.hpp
+++ b/src/slic3r/GUI/DeviceManager.hpp
@@ -52,6 +52,10 @@
 
 #define VIRTUAL_TRAY_MAIN_ID    255
 #define VIRTUAL_TRAY_DEPUTY_ID  254
+
+#define VIRTUAL_AMS_MAIN_ID_STR   "255"
+#define VIRTUAL_AMS_DEPUTY_ID_STR "254"
+
 #define START_SEQ_ID            20000
 #define END_SEQ_ID              30000
 #define SUBSCRIBE_RETRY_COUNT   5
@@ -1314,6 +1318,10 @@ public:
     std::vector<AmsTray> vt_slot;
     AmsTray parse_vt_tray(json vtray);
 
+    /*get ams slot info*/
+    bool    contains_tray(const std::string &ams_id, const std::string &tray_id) const;
+    AmsTray get_tray(const std::string &ams_id, const std::string &tray_id) const;/*use contains_tray() check first*/
+
     /*for parse new info*/
     bool check_enable_np(const json& print) const;
     void parse_new_info(json print);
diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index 68483e14c..f8aa2fef1 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -3255,14 +3255,8 @@ static wxString _check_kval_not_default(const MachineObject* obj, const std::vec
 
     wxString ams_names;
     for (const auto& info : mapping_result) {
-
-        auto ams_iter = obj->amsList.find(info.ams_id);
-        if (ams_iter == obj->amsList.end()) { continue; }
-
-        auto tray_iter = ams_iter->second->trayList.find(std::to_string(info.tray_id));
-        if (tray_iter == ams_iter->second->trayList.end()) { continue; }
-
-        if (tray_iter->second->cali_idx == -1) { continue; } /*-1 means default*/
+        if (!obj->contains_tray(info.ams_id, std::to_string(info.tray_id))) { continue; }
+        if (obj->get_tray(info.ams_id, std::to_string(info.tray_id)).cali_idx == -1) { continue; } /*-1 means default*/
 
         wxString ams_name;
         if (info.tray_id == VIRTUAL_TRAY_MAIN_ID) {