Fixed, thanks.
https://www.openstreetmap.org/way/239775620

The cycleway had been originally mapped as a mixed infrastructure for cyclists and pedestrians… and then we had that mapper who added tons of sidewalks in this part of Brussels, with atrocious geometry problems and duplicate information like here.  I try to fix as much as I can but if you survey this municipality you may probably find more problems.  Thanks for your help.