Duplicated noauthor__nodate entries

keshi10g

I have multiple items in my library with no author and no date. When I export the library as biblatex, some entries are duplicated as in

@online{noauthor__nodate,
title = {},
url = {},
}

@online{noauthor__nodate-1,
title = {},
url = {},
}

@online{noauthor__nodate-2,
title = {},
url = {},
}

@online{noauthor__nodate,
title = {},
url = {},
}

@online{noauthor__nodate-1,
title = {},
url = {},
}

emilianoeheyns

Is this in one export, or multiple that are later combined?