diff --git a/src/BambuStudio.cpp b/src/BambuStudio.cpp
index 38383d53d..41bb161ca 100644
--- a/src/BambuStudio.cpp
+++ b/src/BambuStudio.cpp
@@ -3166,7 +3166,7 @@ int CLI::run(int argc, char **argv)
             }
         }
 
-        if ((load_filament_count > 0) && m_print_config.option<ConfigOptionStrings>("filament_extruder_variant")) {
+        if (m_print_config.option<ConfigOptionStrings>("filament_extruder_variant")) {
             std::vector<int>& filament_self_indice = m_print_config.option<ConfigOptionInts>("filament_self_index", true)->values;
             int index_size = m_print_config.option<ConfigOptionStrings>("filament_extruder_variant")->size();
             filament_self_indice.resize(index_size, 1);
diff --git a/src/libslic3r/PresetBundle.cpp b/src/libslic3r/PresetBundle.cpp
index 602148950..58cdb1e79 100644
--- a/src/libslic3r/PresetBundle.cpp
+++ b/src/libslic3r/PresetBundle.cpp
@@ -2544,7 +2544,13 @@ void PresetBundle::load_config_file_config(const std::string &name_or_path, bool
     bool process_multi_extruder = false;
     std::vector<int> filament_variant_index;
     size_t extruder_variant_count;
-    std::vector<int> filament_self_indice = std::move(config.option<ConfigOptionInts>("filament_self_index", true)->values);
+    if (!config.option<ConfigOptionInts>("filament_self_index")) {
+        std::vector<int>& filament_self_indice = config.option<ConfigOptionInts>("filament_self_index", true)->values;
+        filament_self_indice.resize(num_filaments);
+        for (int index = 0; index < num_filaments; index++)
+            filament_self_indice[index] = index + 1;
+    }
+    std::vector<int> filament_self_indice = std::move(config.option<ConfigOptionInts>("filament_self_index")->values);
     if (config.option("extruder_variant_list")) {
         //3mf support multiple extruder logic
         size_t extruder_count = config.option<ConfigOptionFloatsNullable>("nozzle_diameter")->values.size();