\lowertitleback 被 KOMA scrbook 忽略

\lowertitleback 被 KOMA scrbook 忽略

在我的项目中,该\lowertitleback命令被忽略,我不知道原因。MWE:

\documentclass[12pt]{scrbook}

\usepackage{lipsum}

\begin{document}

    \begin{titlepage}
        \centering
      
      \bigskip
        \vspace{4\baselineskip}
        {\Huge 2023 Book}\par 
        \vspace{2\baselineskip}
        
        \vspace{4\baselineskip}
        {\large\textsc{edited by\\[.5em]The Editor}}
        \vfill
     
    \end{titlepage}
    
    \lowertitleback{ 
    Here is some text.
    Copyright
    ISBN}
    
\chapter*{Chapter 1}
\lipsum[5]    

\end{document}

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