just upload your save file this site https://arceusx.net/renpy-save-editor/ , change "nia_alert00" to 0 .then download your save and paste your new save file and override
Thank you for the pointers, on Windows I was able to find my save files in
C:\Users\<username>\AppData\Roaming\RenPy\Harem Hotel-1520575859
and edit the most recent one, then the event triggered as expected.
