"Upgrade Network" never goes away! v.4.3.1

What you need to do is to start by updating your WordPress, it is a simple one-click procedure: just click on the “Update Now” button when you are notified that a new version is available. In most cases, WordPress will automatically apply maintenance and security updates in the background for you.After your updates to the latest version of WordPress, you can upgrade all the sites on your network.Clicking the Upgrade Network button will step through each site in the network, five at a time, and make sure any database updates are applied.
If a version update to core has not happened, clicking this button won’t affect anything.

Hmm… Well, 4.3.1 is the latest version.

But I did try to reinstall WP and then “Upgrade Network” but no change. Still sitting there looking at me to click it again.

Any other ideas?

Hey hallo Chris, about your question you could be under the impression that if the database needs to be upgraded, a redirect to wp-admin/upgrade.php is performed upon logging in for both single site and sub-sites of a Multisite install.However, that’s not the case, the redirect is only performed for single site. Multisite still tries a full network upgrade viawp_remote_get().
I also do believe database cannot be upgraded in multisite if loopback is disabled.the database is never upgraded from the normal upgrade process.
At least manually going to /wp-admin/upgrade.php and all /subsite/wp-admin/upgrade.php could help fix it.
Try these steps;
1) Get a server where loopback is disabled (or perhaps simulate it using the pre_http_request filter)
2) Install multisite using WP 3.0
3) Create a subsite
4) Upgrade to latest WP version using the link in the admin
5) Check the database version in the wp_options, wp_x_options table
use this code to add the version into dashboard
<>add_action(‘rightnow_end’,’dbversion’);
<>function dbversion(){
<> $dbv = get_option(‘db_version’);
<> echo “DB Version: $dbv”;
6) Log in/out to main site and subsite – database version remains at the old level
7) Manually visit the /subsite/wp-admin/upgrade.php page and upgrade it’s database. The subsite db version will now be correct, but the main site will not until /wp-admin/upgrade.php is also visited
Hope this helps