I already updated the ACF Pro plugin to v5.5.0 and it keeps asking to update my site’s database repeatedly. I click the button, the “updated sucessful” message shows up, but the ACF keeps asking for a database update.
It seems there’s something that prevents ACF from updating your database correctly. Could you please update the database on one of the WordPress’ stock themes (like Twenty Sixteen) with other plugins deactivated. If the notice disappears, then you can activate your theme and plugins again.
If the issue persists, could you please check the error log on your server?
If there’s no error log, could you please open a new ticket and provide temporary admin credentials to your site? You can open a new ticket here: https://support.advancedcustomfields.com/new-ticket. Also, please don’t forget to explain the issue again and provide the link to this thread.
It looks like my server was killing the update query that was taking too long.
[Tue Nov 29 21:00:14.452382 2016] [:error] [pid 14427] [client 184.108.40.206:21049] KILLED QUERY (204070 characters long generated in /nas/wp-content/live/swimswam/wp-content/plugins/advanced-custom-fields-pro/admin/install-updates.php:428): SELECT term_id, meta_key, meta_value FROM wp_termmeta WHERE term_id IN …