There seems to be occasional mismatches between the version of things that tiny-tex ships and that of mirrors. I'm currently deploying an updated version of the docker images (you would need to remove your current image and redownload it, and it might not be ready for another hour). The new update will include the `tlmgr update --self` command, so maybe that will help.
However, what is it that you need to tlmgr install? It might be easier to just always install those packages (unless they are very very big).