To prevent duplicate items in Sitecore I used the following setting
<setting name="AllowDuplicateItemNamesOnSameLevel" value="false" patch:instead="*[@name='AllowDuplicateItemNamesOnSameLevel']"></setting>
This setting is not allowing emails to get triggered(using sitecore 9 forms and exm for forms and emails on submit button click).If I remove this setting then emails are triggering. Can somebody please help?