Error when saving OGR.

Hi,

I would like to update some values in a postgis layer. As I got memory write error, I tried to reduce the code as simple as possible :

var sites = GeoSource.OpenFromDatabase(pgCnx, "ccpav_v4_suf_rgf93");
ok = sites.Data.StartEditingShapes(true); => Ok is true
ok = sites.Data.StopEditingTable(true); => crash as follow

What is wrong ?Am I doing correctly ?