Profile: rexJ-2

Problem:
wp_update_post not updating field guid in backend

Solution:
You should use the WordPress standard hook save_post to update the post information.

You can find the proposed solution, in this case, with the following reply:
=> https://toolset.com/forums/topic/wp_update_post-inside-cred_save_data-not-updating-field-guid/#post-1161346

Relevant Documentation:
https://toolset.com/documentation/customizing-sites-using-php/updating-types-fields-using-php/