Removing exceeding column lines

Can somebody please help me remove the overlapping column lines?
As you can see in the picture below the problem only occurs when I
have a list in the right side.

section{Bildungsweg}

begin{tabular}{r|p{11 cm}}
textsc{10/2015 - 09/2020}& textbf{Bachelorstudium Wirtschaftsinformatik}
textsc{}&Einhorn Universität
begin{itemize}
  item Vertiefungsmodul: Mobile Solutions
  item Thema der Bachelorthesis: newline
 textit{ ``Konzeption eines ganz tollen Algorithmus``} Note (textbf{1,3})
  item Abschluss: textbf{Bachelor of Science (B.Sc.)} mit der Gesamtnote textbf{2.0}
end{itemize}
multicolumn{2}{c}{}
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textsc{10/2011 - 10/2014}& textbf{Bachelorstudium Werkstofftechnik}
textsc{}&Technische Hochschule Nürnberg
multicolumn{2}{c}{}
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textsc{09/2009 - 06/2011}& textbf{Fachhochschulreife}
textsc{}&Hans-Leipelt-Fachoberschule Musterstadt
  begin{itemize}
  item Fachrichtung: Wirtschaft
  end{itemize}
multicolumn{2}{c}{}
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textsc{09/2006 - 07/2008}& textbf{Ausbildung zum Fachinformatiker}
textsc{}&Musterfirma GmbH
multicolumn{2}{c}{}

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