Cannot bind existing OPENCASCADE curve issue while fusing entities

I am trying to fuse two entities and to demonstrate the issue I am facing, here is a snippet that builds two rectangles (using points and lines) and then fuses them. Then I see a info message that
Info : Cannot bind existing OpenCASCADE curve 1 to second tag 15
Info : Could not preserve tag of 1D object 15 (->1)

import gmsh
import sys

gmsh.initialize()
gmsh.model.add("microch")

# Create Points
top_left = gmsh.model.occ.add_point(10, 5, 0, 1)
top_right = gmsh.model.occ.add_point(14, 5, 0, 2)
bottom_right = gmsh.model.occ.add_point(14, 0, 0, 3)
bottom_left = gmsh.model.occ.add_point(10, 0, 0, 4)

# Add lines
top = gmsh.model.occ.add_line(top_left, top_right, 1)
right = gmsh.model.occ.add_line(top_right, bottom_right, 2)
bottom = gmsh.model.occ.add_line(bottom_right, bottom_left, 3)
left = gmsh.model.occ.add_line(bottom_left, top_left, 4)

# Create Points
top_left_1 = gmsh.model.occ.add_point(10, 10, 0, 5)
top_right_1 = gmsh.model.occ.add_point(14, 10, 0, 6)
bottom_right_1 = gmsh.model.occ.add_point(14, 5, 0, 7)
bottom_left_1 = gmsh.model.occ.add_point(10, 5, 0, 8)

# Add lines
top_1 = gmsh.model.occ.add_line(top_left_1, top_right_1, 5)
right_1 = gmsh.model.occ.add_line(top_right_1, bottom_right_1, 6)
bottom_1 = gmsh.model.occ.add_line(bottom_right_1, bottom_left_1, 15)
left_1 = gmsh.model.occ.add_line(bottom_left_1, top_left_1, 8)

gmsh.model.occ.fuse([(1, top)],[(1, bottom_1)])

#
gmsh.model.occ.synchronize()

# Generate mesh
gmsh.model.mesh.generate(2)

# Run GUI if not in script mode
if "-nopopup" not in sys.argv:
    gmsh.fltk.run()

gmsh.finalize()

Thank you!