diff --git a/src/libslic3r/PrintApply.cpp b/src/libslic3r/PrintApply.cpp
index a80ad6f730..0678f75277 100644
--- a/src/libslic3r/PrintApply.cpp
+++ b/src/libslic3r/PrintApply.cpp
@@ -1163,8 +1163,9 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
 
     //apply extruder related values
     if (!extruder_applied) {
-        new_full_config.update_values_to_printer_extruders(new_full_config, printer_options_with_variant_1, "printer_extruder_id", "printer_extruder_variant");
+        // variant_2 must be processed first, because variant_1 will make `printer_extruder_id` and `printer_extruder_variant` half of the size that makes `get_index_for_extruder` no longer work properly
         new_full_config.update_values_to_printer_extruders(new_full_config, printer_options_with_variant_2, "printer_extruder_id", "printer_extruder_variant", 2);
+        new_full_config.update_values_to_printer_extruders(new_full_config, printer_options_with_variant_1, "printer_extruder_id", "printer_extruder_variant");
         //update print config related with variants
         new_full_config.update_values_to_printer_extruders(new_full_config, print_options_with_variant, "print_extruder_id", "print_extruder_variant");