LaTeX Warning: Command `\theauthor' already defined ...

[kberry]

Any document using the ltugboat class (or others, I expect), gets the warning (split on two lines):

LaTeX Warning: Command `\theauthor' already defined -- not changed on input line 7668.     

This is with biblatex.sty 2025/07/10, though it started happening some time ago.

A comment in biblatex.sty around that point talks about the problem, but I'm not sure if it's trying to avoid the warning. Anyway, it's painful. Can it be avoided?

% Since these are bare counters which define \the<string>, save any current val\
ues
% (memoir, titling, koma etc. have a \theauthor macro, for example) and restore\
 at
% end of package

Test input file (simply pdflatex try.tex; same happens with any engine):

\documentclass{ltugboat}
\usepackage{biblatex}
\begin{document}
\end{document}

Full log attached. Thanks.

try.log