Placing bibliography on last page without page break / koma-script

[jezZiFeR]

Am 19. Aug. 2021, 11:06 +0200 schrieb Herbert Voss <Herbert.Voss at fu-berlin.de>:
>
>
> Am 19.08.21 um 10:20 schrieb jezZiFeR:
> > Am 18. Aug. 2021, 19:28 +0200 schrieb Herbert Voss
> > <Herbert.Voss at fu-berlin.de>:
> >
> > Am 18.08.21 um 18:03 schrieb jezZiFeR:
> >
> > thanks for the screenshots!
> > I have entered the lines you mentioned in the preamble.
> > Nonetheless
> > the menu looks different here, I add two screenshots also.
> > Could you
> > still help?
> >
> >
> > try to put it into "Optionen": heading=mybib
> >
> > I have no idea what version you are using.
> >
> > Herbert
> >
> >
> > Thanks again! I use LyX 2.3.6.2 and TeXLive 2021. When I enter the
> > line into »Optionen« I get a large amount of errors, which you could
> > find in the protocol (also XeTeX-version etc.) Maybe I should update
> > something?
>
> ---------------
> ! Undefined control sequence.
> l.161 \defbibheading
>                     {mybib}{%
> The control sequence at the end of
> ---------------
>
>
>
> It is a problem with LyX. It should load biblatex _before_ the user part of
> the preamble, but it did it afterwards. This is the reason why
> \defbibheading
> is unknown. As I already wrote, use
>
> \AtBeginDocument{%
>   \defbibheading{mybib}{%
> .....
>  }}

Thanks again! I have now added:

\AtBeginDocument{%
\defbibheading{mybib}{%
…

in the preamble.

I removed, as I am not sure if this made problems:

\AtBeginDocument{
  \addto\captionsgerman{
    \renewcommand{\contentsname}{Inhalt}
  }
}

I also added

\defbibheading{mybib}{%
   \let\cleardoublepage\relax
…

in the preamble and the parameter
heading=mybib
in the bibliography’s menu.

Again I get a bunch of errors, added in the protocol here.

Sorry, I do not get it, could you still help?
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