undolast move works unless we do a move, undo it, redo the same again,

and undo it once again, it will give an incorrect state of the board, i
try debugging it with hashmaps prints, the hasmaps updates correctly,
the arraylist is emptied before adding the new pieces, idk what doesnt
work, here is the code with the debugging prints

OOP_3B5_Project/src/backend/Board.java

@@ -2,6 +2,8 @@ package backend;
 
 import java.util.ArrayList;
 import java.util.HashMap; // for unddolastmove
+import java.util.Map;
+
 
 public class Board {
 	private int column; // constructors for column and line 
@@ -268,21 +270,26 @@ public class Board {
         boardHistory.put(turnNb, boardCopy); // put the turnNb as the key, and the arraylist data as value
     }
 	
+	
+	// if you dont do the same move nor undo it 2 times in a row it works, even with castling ( but you're not allowed to castle again lol), but idk why it bugs 
 	public void undoLastMove() {
 		if (turnNb > 1) { // only if turnnb is positive
-             
+			turnNb--;
             ArrayList<Piece> previousState = boardHistory.get(turnNb - 1);// create a temporary arraylist 
             
             pieces.clear(); // removes all pieces from arraylist of pieces used
             pieces.addAll(previousState); // add all pieces from previous state of board to arraylist
+            
             boardHistory.remove(turnNb);
-            turnNb--;
+            
+            printBoardHistory();
             
        }else if	(turnNb == 1) {
     	   	turnNb--;
     	   	pieces.clear();
     	   	boardHistory.clear();
     	   	populateBoard();
+    	   	printBoardHistory();
        }
 	}
 
@@ -295,5 +302,16 @@ public class Board {
 		//TODO
 
 	}
+	
+	public void printBoardHistory() {
+        System.out.println("Board History:");
+        for (Map.Entry<Integer, ArrayList<Piece>> entry : boardHistory.entrySet()) {
+            System.out.println("Turn " + entry.getKey() + ":");
+            for (Piece piece : entry.getValue()) {
+                System.out.println(piece); // Assuming Piece has a toString method
+            }
+            System.out.println(); // Add a newline for better readability
+        }
+    }
 
 }

OOP_3B5_Project/src/backend/Move.java

@@ -39,6 +39,7 @@ public class Move {
 	            	board.setTurnNb(turnNb + 1); // adds + 1 to turn nb
 	            	board.saveBoardState(); // after updating the pieces on the board and the turnNb, saves the current state of the board in a hashmap
 	            	System.out.println(board.toString()); // prints the current state of board
+	            	board.printBoardHistory();
 	            }
 	        	break;
 	    			}