Moving key signatures

[Brent Annable]

Hi all,

Rather than having a key-signature change appear at the start of the bar
where it takes effect, I'm trying to move it to the end of the previous bar
(see example). The problem is that Lilypond still reserves space for the
key signature in all other staves at the start of the bar where it usually
is. Is there any way to change that behaviour, so that there's no extra
space?

Many thanks for any help,

Brent.

\version "2.24.4"

\score { \new StaffGroup <<

              \new Staff { \relative c'' {
              \hide Staff.BarLine
              \key bes \major
               c4 c c c | c c c c }
                         }

              \new Staff { \relative c'' {
              \hide Staff.BarLine
              \key bes \major
               c1
               \once \override Staff.KeySignature.extra-offset = #'(-5 . 0)
               \key es \major
               c4 c c c
                                         }
                         }
                         >>
            }