Hi Gabriella sandjong,
this changeset has created errors in the OSM database regarding self intersecting lines:

https://tools.geofabrik.de/osmi/?view=geometry&lon=3.24129&lat=6.63078&zoom=13&baselayer=Geofabrik%20Standard&overlays=self_intersection_ways%2Cself_intersection_points%2Csingle_node_in_way%2Cduplicate_node_in_way

https://overpass-api.de/achavi/?changeset=148322282

Can you please fix this?

Btw. you can avoid uploading such errors by using the internal validator of JOSM.
Kind regards
Guido 