Why not just highlight all the incorrectly entered PIC safety pilot hours with a coloured pen then make an entry on a new page correcting your hours with an explanation and then just carry on in your logbook. You made an error due to bad advice, better to let it show than have to explain a logbook with new pristine entries.
My current logbook is not EASA approved and has never been questioned by an employer or authority despite flying in EASA land.