Markers drops to sea bed

[GamerDreams2019ns]

I revised the map's terrain by adding an island then I noticed all the markers which were floating on top of the water suddenly drops to the sea bed.

Any way to make markers get back to the top of water or any way to prevent it from dropping to sea bed ?

Thanks.

[GamerDreams2019ns]

Ok, found the solution to this problem. I am sure most gamer already knew how to fix this but I am still writing this in case someone has the same problem as mine.

(1) make a backup of the map (the whole folder) in case you screw up.
(2) open your map then click tab "Marker" then click "Layer", Then turn off all the buttons for "Basic" layer but turn on all buttons for "Path" and "AI"
(3) Turn off the Symmetry (to none)
(4) window select all markers on the map
(5) Click tab "Marker" and at the bottom menu, click Export
(6) once exported all markers then press keyboard button "delete" (to delete all markers that have sunken on sea bed)
(7) save map then reopen the same map then make sure the you have turn on the water (in tab Terrain/water)
(8) Click tab "Marker" and at the bottom menu, click Import ...

your markers should now stay floating on the water (took me awhile to figure this out )