Voron 2.4, Y axis is not orthogonal to the plate, can I fix it without disassembly the frame ?

Hi all, I have a problem with my 2.4.
All the printed parts are skewed on Y axis , it's like the 4 Z rails are not exactly at 90 degrees respect to the plate in the YZ plane, they are perfectly square in X.
Can I adjust it without disassembly all the frame ?
Someone did it ? How ?
I don't know why it happened, printer was perfectly square until last week.