diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index 52d19e20c..0f0ceacd2 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -318,11 +318,12 @@ void Preset::normalize(DynamicPrintConfig &config)
 {
     // BBS
     auto* filament_diameter = dynamic_cast<const ConfigOptionFloats*>(config.option("filament_diameter"));
-    if (filament_diameter != nullptr)
+    //not use any more
+    /*if (filament_diameter != nullptr)
         // Loaded the FFF Printer settings. Verify, that all extruder dependent values have enough values.
-        config.set_num_filaments((unsigned int)filament_diameter->values.size());
+        config.set_num_filaments((unsigned int)filament_diameter->values.size());*/
 
-    if (config.option("filament_diameter") != nullptr) {
+    if (filament_diameter) {
         // This config contains single or multiple filament presets.
         // Ensure that the filament preset vector options contain the correct number of values.
         // BBS
diff --git a/src/libslic3r/PresetBundle.cpp b/src/libslic3r/PresetBundle.cpp
index a28497425..89d6d2bef 100644
--- a/src/libslic3r/PresetBundle.cpp
+++ b/src/libslic3r/PresetBundle.cpp
@@ -2044,12 +2044,10 @@ DynamicPrintConfig PresetBundle::full_fff_config(bool apply_extruder, std::vecto
     // BBS
     size_t  num_filaments = this->filament_presets.size();
 
-    if (filament_maps.empty()) {
+    //in some middle state, they may be different
+    if (filament_maps.size() != num_filaments) {
         filament_maps.resize(num_filaments, 1);
     }
-    else {
-        assert(filament_maps.size() == num_filaments);
-    }
 
     auto* extruder_diameter = dynamic_cast<const ConfigOptionFloats*>(out.option("nozzle_diameter"));
     // Collect the "compatible_printers_condition" and "inherits" values over all presets (print, filaments, printers) into a single vector.