My table of contents is two-sided but I don't want to have a letterhead on the second side. I don't know why but `\pagestyle{empty}` doesn't do the job in my case.

**Screenshot**

[![enter image description here](https://i.stack.imgur.com/GcDBi.png)](https://i.stack.imgur.com/GcDBi.png)

**MWE**

```
\documentclass{scrbook}

\usepackage{scrlayer-scrpage}

\usepackage{blindtext}

\begin{document}

\pagestyle{empty} % doesn't work

\tableofcontents

\pagestyle{scrheadings}
\clearpairofpagestyles
\automark[chapter]{chapter} 
\lehead{\pagemark} 
\cehead{\headmark} 
\cohead{\headmark} 
\rohead{\pagemark} 

\chapter{bla}
\blindtext[10]
\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}

\chapter{bla}

\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}

\chapter{bla}

\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}

\chapter{bla}

\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}

\chapter{bla}

\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}
\chapter{bla}

\chapter{bla}

\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}
\chapter{bla}

\chapter{bla}

\section{bla}
\section{bla}
\section{bla}
\section{bla}
\section{bla}

\end{document}

```

**Additional Information**

If `\pagestyle{scrheadings}` is deactivated `\pagestyle{empty}` produces the desired result.