diff --git a/lib/edit/attachmentsStore.js b/lib/edit/attachmentsStore.js
index ffb1da6..32221e2 100644
--- a/lib/edit/attachmentsStore.js
+++ b/lib/edit/attachmentsStore.js
@@ -155,7 +155,36 @@ define([], function()
             }
         }
 
-        this.getUsage = function(callback){
+        this.replaceFeatureId = function(featureLayerUrl, oldId, newId, callback)
+        {
+            var featureId = featureLayerUrl + "/" + oldId;
+
+            var objectStore = this._db.transaction([OBJECT_STORE_NAME],"readwrite").objectStore(OBJECT_STORE_NAME);
+            var index = objectStore.index("featureId");
+            var keyRange = IDBKeyRange.only(featureId);
+            var replacedCount = 0;
+            index.openCursor(keyRange).onsuccess = function(evt)
+            {
+                var cursor = evt.target.result;
+                if(cursor)
+                {
+                    var newFeatureId = featureLayerUrl + "/" + newId;
+                    var updated = cursor.value;
+                    updated.featureId = newFeatureId;
+                    updated.objectId = newId;
+                    objectStore.put(updated);
+                    replacedCount++;
+                    cursor.continue()
+                }
+                else
+                {
+                    callback(replacedCount);
+                }
+            }
+        }
+
+        this.getUsage = function(callback)
+        {
             if(this._db != null){
                 var usage = { sizeBytes: 0, attachmentCount: 0 };
 
diff --git a/test/spec/attachmentsStoreSpec.js b/test/spec/attachmentsStoreSpec.js
index bd8da46..ec97976 100644
--- a/test/spec/attachmentsStoreSpec.js
+++ b/test/spec/attachmentsStoreSpec.js
@@ -101,6 +101,27 @@ describe("attachments store module", function()
 		});
 	});
 
+	async.it("replace feature id", function(done)
+	{
+		g_attachmentsStore.replaceFeatureId("layer1",1,100, function(success)
+		{
+			expect(success).toBe(2);
+			g_attachmentsStore.getAttachmentsByFeatureId("layer1", 1, function(attachments)
+			{
+				expect(attachments.length).toBe(0);
+				g_attachmentsStore.getAttachmentsByFeatureId("layer1", 100, function(attachments)
+				{
+					expect(attachments.length).toBe(2);
+					expect(attachments[0].objectId).toBe(100);
+					expect(attachments[1].objectId).toBe(100);
+					expect(attachments[0].content).toContain("feature 1");
+					expect(attachments[1].content).toContain("feature 1");
+					done();
+				});
+			});
+		});
+	});
+
 	async.it("delete attachments of a single feature", function(done)
 	{
 		g_attachmentsStore.deleteAttachmentsByFeatureId("layer1", 300, function(deletedCount)
@@ -113,7 +134,7 @@ describe("attachments store module", function()
 					expect(usage).not.toBeNull();
 					expect(usage.attachmentCount).toBe(testData.length);
 
-					g_attachmentsStore.deleteAttachmentsByFeatureId("layer1", 1, function(deletedCount)
+					g_attachmentsStore.deleteAttachmentsByFeatureId("layer1", 100, function(deletedCount)
 					{
 						expect(deletedCount).toBe(2);
 						setTimeout(function()