This worked ?? Our developer suggested deactivating synchronization of only Location and Organizer fields, as we have other custom fields in the project as well, and it would allow retaining their synchronization. Just in case it might be useful to someone else, it can be done in the wpml-config.xml file located in the root directory of the active theme by adding these two lines:
<custom-field action=”ignore”>mec_organizer_id</custom-field>
<custom-field action=”ignore”>mec_location_id</custom-field>