diff --git a/src/slic3r/GUI/SyncAmsInfoDialog.cpp b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
index 168a8a7dd..385458d00 100644
--- a/src/slic3r/GUI/SyncAmsInfoDialog.cpp
+++ b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
@@ -317,6 +317,7 @@ bool SyncAmsInfoDialog::is_need_show()
 {
     m_result.direct_sync = true;//init
     m_generate_fix_sizer_ams_mapping = false;//init
+    m_ams_combo_info.clear();
     if (!m_input_info.connected_printer) {
         return true;
     }