Fatal error on some pages after cancelling WPSTAGING cloning process

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Manually Fix Another Update in Process

First you need to visit the cPanel dashboard of your WordPress hosting account. Under the database section, click on the phpMyAdmin icon.
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Next you need to select your WordPress database in phpMyAdmin. This will show you all the tables inside your WordPress database. You need to click on the Browse button next to the WordPress options table (wp_options).
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This will show you all the rows inside the options table. You need to find the row with the option name ‘core_updater.lock’ and click on the delete button next to it.

Delete core updater lock option

PhpMyAdmin will now delete the row from your WordPress database.

You can switch back to your WordPress website and proceed with updating your WordPress website.