 Battery storage technology

Thanks for this package.
I'm trying to modify Storage technology in 'single_year_example.xlsx' by 'Battery'. Modification leads to error : " **ValueError: The following indices are duplicated MultiIndex(levels=[[2023], [], [], [], []],
           codes=[[0], [-1], [-1], [-1], [-1]]**"
I would like to know which types of storage technologies are supported by the package.