Invalid value: For input string:

Error updating, the value of the field must be the FK code for the foreign key, in the INPUT of the form the value br.com.tkcsapcd.model.bean.ProjectInicio@7adacc20, value="$ { "Should something be modified?

                                                          Project Code *

                            <input id="projetoinicio" name="projetoinicio"
                                style="height: 30px; width: 300px"
                                Placeholder="" maxlength="150"
                                value="${termoAberturaProjeto.projetoinicio}" class="input" required="true"
                                onkeypress="return numbers(event);"></input>
                            <p class="hint">[Código do Projeto.]</p></td>
                </tr>