Undo Rhythmic Slashes

How can I undo the Rhythmic slashes in a part? The second and following bars are changed into Rhythmic slashes with “SHFT R- slash” but now I want to undo this and have the regular notation like in bar 1 . There are notes underneath because they stil play during play mode.
Scherm­afbeelding 2025-03-15 om 17.10.54

click in the region and press delete

of course! so simple
Thanks