Arc is splitted into two edges

Dear All,
I have been using Salome for a quite long time, however, recently I am facing the following issue which causing issues when meshing the geometry. In sharper module I have a pipe the top of the pipe arc is subdivided into two edges that should not be the case see the case (the segments are highlighted) could you help me make it one edge ? I did not understand how to use gluing or sewing to make them one edge on sharper or geom.

Cheers,

the second image

hello,

try (not sure it works) to use in geom (i think in shaper it is available) repair/remove extra edges with the union faces to true.