diff --git a/litris.py b/litris.py
index 01d2620..3c0cc7f 100644
--- a/litris.py
+++ b/litris.py
@@ -82,7 +82,7 @@ class Litris(GameBase):
             print(self.field)
             if self.field.get_line_count() >= 6 and self.field.height() <= 2 and self.field.check_crucial_pos_to_be_free():
                 if self.field.predict_gaps_in_next_rotation() <= 3:
-                    self.field_state_storage[self.move_mode] = self.field
+                    self.field_state_storage[self.move_mode] = copy(self.field)
                     self.update_move_mode()
                     #self.field.state = self.stone_id_thread.get_current_board_state()
                     self.field.rotate_state()