Hi,
the last_cookie field it's not a default field from MyBB, so it was added by a plugin. Check what plugins are installed (or were installed) that add this extra field.
If you don't use it anymore, try to install and uninstall it again to remove the field.
If you use it, try to reinstall it.
the last_cookie field it's not a default field from MyBB, so it was added by a plugin. Check what plugins are installed (or were installed) that add this extra field.
If you don't use it anymore, try to install and uninstall it again to remove the field.
If you use it, try to reinstall it.
I don't answer questions about localhost forums or forums without URL, I'm not a seer. 