private void putUpdateStoredBlock(StoredBlock storedBlock, boolean wasUndoable)
      throws SQLException {
    try {
      PreparedStatement s =
          conn.get()
              .prepareStatement(
                  "INSERT INTO headers(hash, chainWork, height, header, wasUndoable)"
                      + " VALUES(?, ?, ?, ?, ?)");
      // We skip the first 4 bytes because (on prodnet) the minimum target has 4 0-bytes
      byte[] hashBytes = new byte[28];
      System.arraycopy(storedBlock.getHeader().getHash().getBytes(), 3, hashBytes, 0, 28);
      s.setBytes(1, hashBytes);
      s.setBytes(2, storedBlock.getChainWork().toByteArray());
      s.setInt(3, storedBlock.getHeight());
      s.setBytes(4, storedBlock.getHeader().unsafeRimbitSerialize());
      s.setBoolean(5, wasUndoable);
      s.executeUpdate();
      s.close();
    } catch (SQLException e) {
      // It is possible we try to add a duplicate StoredBlock if we upgraded
      // In that case, we just update the entry to mark it wasUndoable
      if (!(e.getSQLState().equals(POSTGRES_DUPLICATE_KEY_ERROR_CODE)) || !wasUndoable) throw e;

      PreparedStatement s =
          conn.get().prepareStatement("UPDATE headers SET wasUndoable=? WHERE hash=?");
      s.setBoolean(1, true);
      // We skip the first 4 bytes because (on prodnet) the minimum target has 4 0-bytes
      byte[] hashBytes = new byte[28];
      System.arraycopy(storedBlock.getHeader().getHash().getBytes(), 3, hashBytes, 0, 28);
      s.setBytes(2, hashBytes);
      s.executeUpdate();
      s.close();
    }
  }