Error when trying to print vectors (they change their values)

I have problems when printing some vectors.

I must fill 2 vectors of 5 positions each, then go through those vectors and if there are repeated values exchange those values repeated by -1, but keeping one of them and storing that modified vector in an auxiliary vector since the original vector does not you can touch.

Example:

vec1={1, 3, 5, 3, 6}   aux1={1, 3, 5, -1, 6}

vec2={1, 2, 2, 3, 5}   aux2={1, 2, -1, 3, 5}

The problem is that the code is printing me this Assuming that I fill the vector with these values: vec1={1, 3, 5, 3, 6}, vec2={1, 2, 2, 3, 5} print:

vec1={1, 3, 5, -1, 6}   aux1={1, 3, 5, -1, 6}

vec2={1, 2, -1, 3, 5} aux2={1, 2, -1, 3, 5}

but I do not know because since vector vec1 and vec2 never modified it

    public class revisar {
    static Scanner sc = new Scanner(System.in);
    static int d1=0, d2=0;
    static int vec1[]=new int[5]; 
    static int vec2[]=new int[5];
    static int aux1[]=new int[5];
    static int aux2[]=new int[5]; 
    public static void main(String[] args) {
         llenar();
         cdimensiones();
         mostrar();
    }
    public static void llenar(){
         int i;
         for(i=0; i<=4; i++){
           System.out.println("Ingrese el valor "+(i+1)+" del vector 1");
           vec1[i]=sc.nextInt();
         }

         for(i=0; i<=4; i++){
           System.out.println("Ingrese el valor "+(i+1)+" del vector 2");
           vec2[i]=sc.nextInt();
         }
         System.arraycopy(vec1, 0, aux1, 0, vec1.length);
         System.arraycopy(vec2, 0, aux2, 0, vec2.length);
    }
    public static void cdimensiones(){
       int i, j, sum=0, k;
       aux1=revrep(vec1);
       aux2=revrep(vec2);
    }
    public static int[] revrep(int array[]){
       int i, j;
       for(i=0; i<=3; i++){
          if(array[i]!=-1){
            for(j=(i+1); j<=4; j++){
                if(array[i]==array[j]){
                      array[j]=-1;
                }
             }
          }
       }

      return array;
    }
    public static void mostrar(){
       int i;
       System.out.print("\n");
       System.out.println("Auxiliar 1 es: ");
       for(i=0; i<=4; i++){
           System.out.print(aux1[i]+ " ");
       }
       System.out.print("\n");

       System.out.println("Vector 1 es: ");
       for(i=0; i<=4; i++){
           System.out.print(vec1[i]+ " ");
       }
       System.out.print("\n");

       System.out.println("Auxiliar 2 es: ");
       for(i=0; i<=4; i++){
           System.out.print(aux2[i]+ " ");
       }
       System.out.print("\n");

       System.out.println("Vector 2 es: ");
       for(i=0; i<=4; i++){
           System.out.print(vec2[i]+ " ");
       }
   }
}