Package natbib Error: Bibliography not compatible with author-year citations (Elsevier template)

I am getting an error "Package natbib Error: Bibliography not compatible with author-year citations.
(natbib) Press to continue in numerical citation style."

I am to generate the reference number at the text which works great and gives me good results on the PDF but still getting error!

%%%%%%%%%%%%%Elsevier template %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
documentclass[5p,preprint,authoryear]{elsarticle}

journal{Energy}
setcitestyle{square}
usepackage{times}
usepackage{hyperref}
usepackage{graphicx}
usepackage{subfig}
usepackage{amsmath}
usepackage{circuitikz}
usetikzlibrary{patterns}
usepackage{array,booktabs}
usepackage{natbib}
usepackage{tikz}
usepackage{float}


begin{document}

begin{frontmatter}

begin{abstract}
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end{abstract}

end{frontmatter}

section{Introduction}
Latex Latex Latex  Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex Latex cite{nazari2019optimal}. 




biboptions{sort&compress}
bibliographystyle{elsarticle-num}
bibliography{citation.bib}

end{document}

endinput
%%
%% End of file `elsarticle-template-harv.tex'.

my citation

@article{nazari2019optimal,
  title={Optimal energy management for a mild hybrid vehicle with electric and hybrid engine boosting systems},
  author={Nazari, Shima and Siegel, Jason and Stefanopoulou, Anna},
  journal={IEEE Transactions on Vehicular Technology},
  volume={68},
  number={4},
  pages={3386--3399},
  year={2019},
  publisher={IEEE}
}