diff --git a/src/slic3r/GUI/SyncAmsInfoDialog.cpp b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
index f155ada07..168a8a7dd 100644
--- a/src/slic3r/GUI/SyncAmsInfoDialog.cpp
+++ b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
@@ -4128,8 +4128,8 @@ void SyncAmsInfoDialog::clone_thumbnail_data(bool allow_clone_ams_color)
             if (item) {
                 auto m = item->item;
                 if (m) {
-                    m_preview_colors_in_thumbnail[id] = m->m_material_coloul;
                     if (item->id < m_cur_colors_in_thumbnail.size()) {
+                        m_preview_colors_in_thumbnail[item->id] = m->m_material_coloul;
                         if (m->m_ams_name == "-") {
                             m_cur_colors_in_thumbnail[item->id] = m->m_material_coloul;
                         } else {
@@ -4138,6 +4138,8 @@ void SyncAmsInfoDialog::clone_thumbnail_data(bool allow_clone_ams_color)
                     } else { // exist empty or unrecognized type ams in machine
                         m_cur_colors_in_thumbnail.resize(item->id + 1);
                         m_cur_colors_in_thumbnail[item->id] = m->m_ams_coloul;
+                        m_preview_colors_in_thumbnail.resize(item->id + 1);
+                        m_preview_colors_in_thumbnail[item->id] = m->m_material_coloul;
                     }
                 }
             }