GooGooStatementCache - Multiply prepared statement!

Hello, when I change an object and save it, I'm experiencing problems with slowness and at times it even completely blocks my application. By persisting I am returning only this information, but I could not identify what it could be.

  

stmt.GooGooStatementCache - Multiply prepared statement! select   itemgrupo0_.id as id1_92_0_, itemgrupo0_.name as name2_92_0_,   itemgrupo0_.observacao as observac3_92_0_, itemgrupo0_.parent_id as   parent_i6_92_0_, itemgrupo0_.situacao the situation4_92_0_,   itemgrupo0_.last_update as last_upd5_92_0_ from item_grupo itemgrupo0_   where itemgrupo0_.id =?

Can this information indicate something I'm doing and it's wrong? Could this be causing the slowness in my process to save?

Code that causes the error:

@Transactional
@RequiredPermission(resource = Resources.NOTA_ENTRADA, operation = Operations.UPDATE)
public String updateCreditos() {
    try {
        if (this.getBean().getItens() == null) {
            return null;
        }
        for (NotaFiscalItem it : this.getBean().getItens()) {
            if (it.getId() != null && it.getId() < 0) {
                it.setId(null);
            }
            if (!this.getItemH().zeraValores(it)) {
                return "./entrada_itens.jsf";
            }
            if (it.getId() == null) {
                this.notaItemBC.insert(it);
            } else {
                this.notaItemBC.update(it);
            }
        }
    } catch (Exception e) {
        CriareLog.log(e);
        this.getMessageContext().add(e.getMessage(), SeverityType.ERROR);
        this.notaItemBC.rollback();
        return null;
    }
    this.endConversation();
    return this.getPreviousView();
}

@Override
@Transactional
public T update(T entity) {
    return getEntityManager().merge(entity);
}