I have a problem during upgrade the WP 2.3.3 to 2.5,
After all file exclude the content, and we try to go to dashboard, and the system ask me to upgrade database, and after that we found the message like this:
Fatal error: Call to undefined function: populate_roles_250() in /home/——-/public_html/optikonline/wp-admin/includes/upgrade.php on line 727
so hurry up, <b>please help me</b>
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