kotex과 amsmath를 함께 사용하는 것이 문제 없이 잘 되었었는 패키지 업데이트하고 나서 갑자기 에러가 납니다. 어떻게 해야할까요?

소스 코드:

\documentclass{oblivoir}
\usepackage{amsmath}

\begin{document}

\end{document}

오류 메시지:

! LaTeX Error: Command `\acute' already defined.

xelatex으로 컴파일했고 버전은 다음과 같습니다.

$ xelatex --version
XeTeX 3.14159265-2.6-0.999991 (TeX Live 2019)
kpathsea version 6.3.1
Copyright 2019 SIL International, Jonathan Kew and Khaled Hosny.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the XeTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the XeTeX source.
Primary author of XeTeX: Jonathan Kew.
Compiled with ICU version 63.1; using 63.1
Compiled with zlib version 1.2.11; using 1.2.11
Compiled with FreeType2 version 2.9.1; using 2.9.1
Compiled with Graphite2 version 1.3.13; using 1.3.13
Compiled with HarfBuzz version 2.3.1; using 2.3.1
Compiled with libpng version 1.6.36; using 1.6.36
Compiled with poppler version 0.68.0
Using Mac OS X Core Text and Cocoa frameworks