我做了两个表一个为用户和一个为项目，但项目是不是由于某种原因

private static final String TABLE_NAME = "Users";
    private static final String COLUMN_ID = "_id";
    private static final String COLUMN_USERNAME = "Username";
    private static final String COLUMN_PASSWORD = "Password";
//    Column and table for new project
    private static final String PROJECT_TABLE = "Project";
    private static final String COLUMN_id = "id";
    private static final String COLUMN_PROJECT_NAME = "projectName";
    private static final String COLUMN_DESCRIPTION = "description";
    private static final String COLUMN_TEAM = "team";
    private static final String COLUMN_PROJECT_MANAGER = "Project_Manager";

    @Override
    public void onCreate(SQLiteDatabase db) {
        String query =  "CREATE TABLE " + TABLE_NAME +
                "(" + COLUMN_ID +" INTEGER PRIMARY KEY AUTOINCREMENT, " +
                COLUMN_USERNAME + " TEXT, " +
                COLUMN_PASSWORD + " TEXT);";

        String project = "CREATE TABLE " + PROJECT_TABLE +
                "(" + COLUMN_id +" INTEGER PRIMARY KEY AUTOINCREMENT, " +
                COLUMN_PROJECT_NAME + " TEXT, " +
                COLUMN_DESCRIPTION + " TEXT, " +
                COLUMN_TEAM + " TEXT, " +
                COLUMN_PROJECT_MANAGER + " TEXT);";
        db.execSQL(project);
        db.execSQL(query);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int i, int i1) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        db.execSQL("DROP TABLE IF EXISTS " + PROJECT_TABLE);
        onCreate(db);

    }

    void addProject(String projectName, String Description, String team, String projectManager){
        SQLiteDatabase db = this.getReadableDatabase();
        ContentValues cv = new ContentValues();
        cv.put(COLUMN_PROJECT_NAME, projectName);
        cv.put(COLUMN_DESCRIPTION, Description);
        cv.put(COLUMN_TEAM, team);
        cv.put(COLUMN_PROJECT_MANAGER, projectManager);
        long result = db.insert(PROJECT_TABLE, null ,cv);
        if(result == -1){
            Toast.makeText(context, "Failed to add new project", Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(context, "Successfully added new project", Toast.LENGTH_SHORT).show();
        }
    }

在我的项目java类中，我想可能数据没有正确地插入到数据库中，所以我在db.addProject中编写了代码以获取字符串和文本，但它仍然不起作用

public class Board extends AppCompatActivity {
    private EditText projectName, description, team, projectManager;
    Button done;
    userDB db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_board);
        projectName = findViewById(R.id.projectName);
        description = findViewById(R.id.description);
        team = findViewById(R.id.team);
        projectManager = findViewById(R.id.projectManager);
        done = findViewById(R.id.button);

        done.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String projectname = projectName.getText().toString().trim();
                String desc = description.getText().toString().trim();
                String Team = team.getText().toString().trim();
                String projectmanage = projectManager.getText().toString().trim();

                if(projectname.equals("") || desc.equals("") || Team.equals("") ||
                projectmanage.equals("")){
                    Toast.makeText(Board.this, "All Fields are Required", Toast.LENGTH_SHORT).show();
                }else{
                    db = new userDB(Board.this);
                    db.addProject(projectName.getText().toString().trim(),
                            description.getText().toString().trim(),
                            team.getText().toString().trim(),
                            projectManager.getText().toString().trim());
                    Intent intent = new Intent(Board.this, MainActivity.class);
                    startActivity(intent);
                    finish();
                }
            }
        });

    }
}

我试过重新编译一些语法，但结果都是同样的错误。我已经被这个错误卡住了3个小时，我不知道该怎么办了;-;