Dear Anton,
PyTables > 3.9 depends on c-blosc2 that in not available on s390x.
As a consequence PyTables itself is no longer buildable on that platform.
Please note that this will have a consequence on the sfepy package,
maintained by you, that currently depends on pytables.
In #1061661 I have already requested the removal of python3-tables-lib
from unstable [s390x].
Are you fine with removing sfepy form unstable [s390x] as well?
[#1061661] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1061661
kind regards
--
Antonio Valentino