applyEdits error

[AbdulMateen]

using javascript api 3.2 , code below sometimes created newfeature saves perfectly
sometimes does not save feature its strange,

arcgis server logs:
Error while adding a Feature/ Object Layer/Table: operationsPolygonLayer .

browser debugging error description:

addResults: [{success:false, error:{code:1017, description:Internal error during object insert.}}]

     
function init() {
       map = new esri.Map("map"); 
//Editing on this layer
            operationsPolygonLayer = new esri.layers.FeatureLayer("http://xyz/arcgis/rest/services/Kashfeaedit/FeatureServer/1",  {      mode: esri.layers.FeatureLayer.MODE_SELECTION,outFields: ["*"] });    
     dojo.connect(map, "onLayersAddResult", addtomap);
          map.addLayers([operationsPolygonLayer]);
          Drawtoolbar = new esri.toolbars.Draw(map);        
          map.infoWindow.resize(400, 600);
        }

function addToMap(evt) {
  Drawtoolbar.deactivate();  
 var template = operationsPolygonLayer .types[0].templates[0];  
      var attributes = dojo.mixin({},template.prototype.attributes);   
var newGraphic = new esri.Graphic(evt, null, operationPolygonLayerAttributes);
                     operationsPolygonLayer.applyEdits([newGraphic], null, null); 
                    basemaplocaldynamic.refresh();
       }

Any idea higly appriciated.