diff --git a/src/OrcaSlicer.cpp b/src/OrcaSlicer.cpp
index 4e2fe2a817..cbbc702fde 100644
--- a/src/OrcaSlicer.cpp
+++ b/src/OrcaSlicer.cpp
@@ -5742,6 +5742,7 @@ int CLI::run(int argc, char **argv)
                                     mode = m_extra_config.option<ConfigOptionEnum<FilamentMapMode>>("filament_map_mode")->value;
                                 else
                                     mode = part_plate->get_real_filament_map_mode(m_print_config);
+                                BOOST_LOG_TRIVIAL(info) << boost::format("%1% :filament map mode is %2% ") % __LINE__ %(int)mode;
                                 if (mode < FilamentMapMode::fmmManual) {
                                     std::vector<int> conflict_filament_vector;
                                     for (int index = 0; index < new_extruder_count; index++)
@@ -5778,6 +5779,43 @@ int CLI::run(int argc, char **argv)
                                     std::vector<int> filament_maps;
                                     if (m_extra_config.option<ConfigOptionInts>("filament_map")) {
                                         filament_maps = m_extra_config.option<ConfigOptionInts>("filament_map")->values;
+                                        int default_value = -1;
+                                        bool has_invalid_value = false;
+                                        for (int f_index = 0; f_index < filament_maps.size(); f_index++)
+                                        {
+                                            if (filament_maps[f_index] != -1)
+                                            {
+                                                if (default_value == -1)
+                                                    default_value = filament_maps[f_index];
+                                                else
+                                                    continue;
+                                            }
+                                            else
+                                                has_invalid_value = true;
+
+                                            if (has_invalid_value && (default_value != -1))
+                                                break;
+                                        }
+                                        BOOST_LOG_TRIVIAL(info) << boost::format("%1% :filament map default_value %2%, has_invalid_value %3% ") % __LINE__ %default_value %has_invalid_value;
+
+                                        if (has_invalid_value)
+                                        {
+                                            for (int f_index = 0; f_index < filament_maps.size(); f_index++)
+                                            {
+                                                if (filament_maps[f_index] == -1)
+                                                {
+                                                    if (default_value != -1) {
+                                                        filament_maps[f_index] = default_value;
+                                                        BOOST_LOG_TRIVIAL(info) << boost::format("plate %1% : set filament_map of filament %2% to first value %3%.")% (index + 1) %(f_index+1) %default_value;
+                                                    }
+                                                    else {
+                                                        filament_maps[f_index] = 1;
+                                                        BOOST_LOG_TRIVIAL(info) << boost::format("plate %1% : set filament_map of filament %2% to default value 1.")% (index + 1) %(f_index+1);
+                                                    }
+                                                }
+                                            }
+                                            m_extra_config.option<ConfigOptionInts>("filament_map")->values = filament_maps;
+                                        }
                                         part_plate->set_filament_maps(filament_maps);
                                     }
                                     else