so my compiler is telling me I have already used case 2 once, even though it’s inside another switch, So the problem is, my compiler is letting me use the case 1 again, but not case 2, Why is that?, I’ll show:

scanf("%d", &choice);
while (choice !=4){
    switch (choice){
    case 1:
        printf("Enter a character: ");
        scanf("\n%c", &item);
        insert(&startPtr, item);
        printList(startPtr);
        break;
    case 2:
        if (!isEmpty(startPtr)){
            printf("Enter character to be deleted: ");
            scanf("\n%c", &item);
            enqueue(&headPtr, &tailPtr, item);                  
            if (delete(&startPtr, item)){
                printf("%c deleted.\n", item);
                printList(startPtr);
            }
            else
                printf("List is empty or the element doesn´t exist.\n\n");
            break;
        case 3:
            instructions2();
            scanf("%d", choice2);
            if (choice2 !=3){
                switch(choice2)
                case 1:
                    printQueue(headPtr);
                break;
            case 2:
                delete2(headPtr);
                break;
            }
            else
                return 0;   
            break;
        default:
            printf("Invalid choice.\n\n");
            instructions();
            break;
        }
    }
    printf("? ");
    scanf("%d", &choice);
}