python3-fltk is declared Multi-Arch: same, but fails to coinstall.

The file /usr/lib/python3/dist-packages/fltk/fltk.py is shared by
python3-fltk/1.4.2.0-2 as present in trixie with varying content.

Please ensure that shared files have bit-identical content across
architectures, move architecture-dependent files to
architecture-dependent paths or remove the Multi-Arch: same field.

Kind regards

Helmut Grohne