This is common. At some point you may have edited that file. It's a warning telling you that if you upgrade your changes may be overwritten. In the settings you may check a box telling the system to upgrade anyway, even if you have changed core files.
This is common. At some point you may have edited that file. It's a warning telling you that if you upgrade your changes may be overwritten. In the settings you may check a box telling the system to upgrade anyway, even if you have changed core files.
This setting is Studio > Settings > System > SITE SETTINGS > Force auto-update, even if some files were modified