Glossaries PDF bookmark contains equals sign before

I am writting a thesis with the scrreprt document class and the glossaries package. I have a problem with the PDF bookmarks of the glossaries. As you can see in the picture below there is a equal sign in front of the glossary bookmarks. I do not know why the equal sign appears in front of the bookmarks and i want to get rid of it. I am very grateful for your help.

Here is a minimal working document that you could use for testing:

%##### Praeambel: ##########################################################################

documentclass[
    12pt,                                       
    DIV=13,                                     
    paper=A4,                               
    parskip=half,
    listof=totoc                                
]{scrreprt}

usepackage[utf8]{inputenc}
usepackage[ngerman]{babel}

% Hyperlinks:
usepackage[                                    
    bookmarks         = true,                   
    bookmarksnumbered = true,                   
    pdfpagemode       = {UseOutlines},      
    plainpages        = false,              
    pdfpagelabels     = true,                   
    colorlinks        = true,               
    linkcolor         = {black},            
    citecolor         = {black},                
    urlcolor          = {black},                
]{hyperref}

% Glossaries:
usepackage[
    acronym,
    toc,
]{glossaries}

usepackage{glossary-longbooktabs}

makeglossaries

newglossaryentry{latex}{
    name=latex,
    description={Is a mark up language specially suited for scientific documents}
}

newglossaryentry{maths}{
    name=mathematics,
    description={Mathematics is what mathematicians do}
}

newglossaryentry{formula}{
    name=formula,
    description={A mathematical expression}
}

newacronym{afk}{AFK}{Away from keyboard}
newacronym{btw}{BTW}{By the way}
newacronym{fyi}{FYI}{For your interest}
newacronym{asap}{ASAP}{As soon as possible}


setlength{parindent}{0pt}                     
usepackage{blindtext}                      


%##### Text: ##############################################################################
begin{document}

    tableofcontents    
    
    printglossary[title={protectcenteringacronymname}, type=acronymtype, style=long3col-booktabs]
    printglossary[title={protectcenteringglossaryname}, style=long3col-booktabs]

    clearpage

    chapter{Einleitung}
    The Gls{latex} typesetting markup language is specially suitable for documents that include 
    gls{maths}. Glspl{formula} are rendered properly an easily once one gets used to the commands.
    acrfull{fyi} das Akronym acrshort{asap}, steht für acrlong{asap}. acrshort{btw} ich bin jetzt 
    acrshort{afk}.

    section{Motivation}
    blindtext
    
    listoffigures

end{document}