your fit file starts after km45 until the end at km144, no other data present in that file
needs a little bit of tuning to get the speed
please check this file ... swin2000-e810-kaput-part20-2020-03-29-07-16-39.zip

happy & safe sporting
hi,
how was the swim
your file can be repaired with help of Fit File Tools's section remover (try it)

check this file 6472.fitfiletools.zip
happy & safe sporting
repaired with Fit File Repair Tool
saved as cycling activity
check this file 8611.fitfiletools-fixed.zip
happy & safe sporting