docs: protected void updateDataVersion() {
          Connection conn = null;
          try {
              long newVersion = System.currentTimeMillis();
  
              conn = ds.getConnection();
              conn.setAutoCommit(false);
              QueryRunner run = new QueryRunner();
  
              run.update(conn, "DELETE FROM gw_dataversion"); //$NON-NLS-1$
              run.update(conn, "INSERT INTO gw_dataversion (version) VALUES (?)",  //$NON-NLS-1$
                      newVersion);
  
              DbUtils.commitAndClose(conn);
              dataVersion = newVersion;
          } catch (SQLException e) {
              dataVersion = -1;
          }
      }