How to remove extra edges?

Hello dear Salome community.

I get an extra edge when I extrude a cylinder from a sketch. The extra edge is a line on the cylinder’s surface that creates problems when meshing.

In Shaper module, I would open a sketch and draw a circle. Then I would extrude it. Then I export it to Geometry module. Then I use “Remove extra edges” function. And nothing happens: the extra edge is still there.

I’m wondering if anybody can tell me how to remove that edge from the cylinder’s surface, please.

Thank you in advance.