diff --git a/app-proto/src/assembly.rs b/app-proto/src/assembly.rs
index 78228cc..b119d5b 100644
--- a/app-proto/src/assembly.rs
+++ b/app-proto/src/assembly.rs
@@ -161,7 +161,7 @@ impl Assembly {
             for (_, elt) in elts {
                 let index = elt.index;
                 gram_to_be.push_sym(index, index, 1.0);
-                guess_to_be.set_column(index, &elt.representation.get_clone());
+                guess_to_be.set_column(index, &elt.representation.get_clone_untracked());
             }
             
             (gram_to_be, guess_to_be)
@@ -203,7 +203,7 @@ impl Assembly {
         
         if success {
             // read out the solution
-            for (_, elt) in self.elements.get_clone() {
+            for (_, elt) in self.elements.get_clone_untracked() {
                 elt.representation.update(
                     |rep| rep.set_column(0, &config.column(elt.index))
                 );