无法升级或更改Heroku上的tex live安装

由于tex live不兼容，现在拒绝向Heroku推送我的应用程序更新。请参阅下面的错误消息

Heroku错误消息

remote: tlmgr: Remote repository is newer than local (2018 < 2019)
remote: Cross release updates are only supported with
remote:   update-tlmgr-latest(.sh/.exe) --update
remote: Please see https://tug.org/texlive/upgrade.html for 
details.
remote:  !     Push rejected, failed to compile TeX Live app.

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此操作有效：在文件texlive.packages中，替换

ftp://tug.org/historic/systems/texlive/2018/tlnet-final

与

解决方案由犹他大学数学系Nelson Beebe

ftp://tug.org/historic/systems/texlive/2018/tlnet-final

https://www.math.utah.edu/pub/texlive/historic/systems/texlive/2018/tlnet-final