diff --git a/app/src/main/java/gui/menu/SudokuView.java b/app/src/main/java/gui/menu/SudokuView.java
index b873a95..58e22bc 100644
--- a/app/src/main/java/gui/menu/SudokuView.java
+++ b/app/src/main/java/gui/menu/SudokuView.java
@@ -92,6 +92,7 @@ public class SudokuView extends BaseView {
 	}
 
 	private void startSolve(Solver solver) {
+		this.doku.clearMutableCells();
 		resolveThread = new Thread(() -> {
 			List<SolverStep> steps = new ArrayList<>();
 			try {