使用共享点pnp

Question

当我调试此代码时，它工作正常，但是在调试此代码之前，我运行此代码时遇到错误

  

由于保存冲突，术语更新失败

我该如何解决这个问题？

List<ImportTerms> level1TermItems = termItems.Where(cti =>
        !String.IsNullOrEmpty(cti.Level1Term) &&
        String.IsNullOrEmpty(cti.Level2Term)).ToList();

NavigationTerm childTerm = null;
foreach (ImportTerms level1TermItem in level1TermItems)
{
    childTerm = termBrand.CreateTerm(level1TermItem.Level1Term, NavigationLinkType.SimpleLink, Guid.NewGuid());
    childTerm.SimpleLinkUrl = "/sites/" + Consts.CONTENT_SEARCH_WEB_PART_SITE_URL + "/Pages/" + Consts.WEB_PART_PAGE_NAME + "?b=" + level1TermItem.Level1Term;
    childTerm.GetTaxonomyTerm().TermStore.CommitAll();
    ctx.ExecuteQuery();
    childTerm = null;
}
ctx.ExecuteQuery();