Well-known member
I have an instance where upgrading an add-on by uploading the changed files first (before upgrading using the XML file) will result in an error:

ErrorException: Fatal Error: Cannot redeclare class XFCP_Valhalla_Multiview_Model_Forum - library/XenForo/Application.php(514) : eval()'d code:1

Can this be handled in some way?

This can be handled by upgrading the add-on using the XML file, and then uploading the changed files, but I want to confirm there is nothing I could do before advising against an established upgrade habit.

If I advise users to disable the add-on prior to upgrading, the error still occurs upon uploading the changed files.

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