diff --git a/CMakeLists.txt b/CMakeLists.txt
index aa517e6..8a99b02 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(blt-gp VERSION 0.0.66)
+project(blt-gp VERSION 0.0.67)
 
 include(CTest)
 
diff --git a/include/blt/gp/program.h b/include/blt/gp/program.h
index 81c8a22..1c20d19 100644
--- a/include/blt/gp/program.h
+++ b/include/blt/gp/program.h
@@ -310,10 +310,6 @@ namespace blt::gp
                                                                                               std::memory_order::memory_order_release,
                                                                                               std::memory_order::memory_order_acquire));
                                 
-                                auto old_begin = begin;
-                                begin = config.population_size - end;
-                                end = config.population_size - old_begin;
-                                
                                 for (blt::size_t i = begin; i < end; i++)
                                 {
                                     auto& ind = current_pop.get_individuals()[i];