diff --git a/src/com/android/launcher3/model/GridSizeMigrationTaskV2.java b/src/com/android/launcher3/model/GridSizeMigrationTaskV2.java
index ef9250c..a7b0b9d 100644
--- a/src/com/android/launcher3/model/GridSizeMigrationTaskV2.java
+++ b/src/com/android/launcher3/model/GridSizeMigrationTaskV2.java
@@ -56,6 +56,7 @@
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 /**
  * This class takes care of shrinking the workspace (by maximum of one row and one column), as a
@@ -267,38 +268,33 @@
 
     /** Return what's in the src but not in the dest */
     private static List<DbEntry> calcDiff(List<DbEntry> src, List<DbEntry> dest) {
-        Set<String> destIntentSet = new HashSet<>();
-        Set<Map<String, Integer>> destFolderIntentSet = new HashSet<>();
+        Map<String, Integer> destIdSet = new HashMap<>();
         for (DbEntry entry : dest) {
-            if (entry.itemType == LauncherSettings.Favorites.ITEM_TYPE_FOLDER) {
-                destFolderIntentSet.add(getFolderIntents(entry));
+            String entryID = entry.getEntryMigrationId();
+            if (destIdSet.containsKey(entryID)) {
+                destIdSet.put(entryID, destIdSet.get(entryID) + 1);
             } else {
-                destIntentSet.add(entry.mIntent);
+                destIdSet.put(entryID, 1);
             }
         }
         List<DbEntry> diff = new ArrayList<>();
         for (DbEntry entry : src) {
-            if (entry.itemType == LauncherSettings.Favorites.ITEM_TYPE_FOLDER) {
-                if (!destFolderIntentSet.contains(getFolderIntents(entry))) {
+            String entryID = entry.getEntryMigrationId();
+            if (destIdSet.containsKey(entryID)) {
+                Integer count = destIdSet.get(entryID);
+                if (count <= 0) {
                     diff.add(entry);
+                    destIdSet.remove(entryID);
+                } else {
+                    destIdSet.put(entryID, count - 1);
                 }
             } else {
-                if (!destIntentSet.contains(entry.mIntent)) {
-                    diff.add(entry);
-                }
+                diff.add(entry);
             }
         }
         return diff;
     }
 
-    private static Map<String, Integer> getFolderIntents(DbEntry entry) {
-        Map<String, Integer> folder = new HashMap<>();
-        for (String intent : entry.mFolderItems.keySet()) {
-            folder.put(intent, entry.mFolderItems.get(intent).size());
-        }
-        return folder;
-    }
-
     private static void insertEntryInDb(SQLiteDatabase db, Context context, DbEntry entry,
             String srcTableName, String destTableName) {
         int id = copyEntryAndUpdate(db, context, entry, srcTableName, destTableName);
@@ -780,5 +776,31 @@
             values.put(LauncherSettings.Favorites.SPANX, spanX);
             values.put(LauncherSettings.Favorites.SPANY, spanY);
         }
+
+        /**
+         * This method should return an id that should be the same for two folders containing the
+         * same elements.
+         */
+        private String getFolderMigrationId() {
+            return mFolderItems.keySet().stream()
+                    .map(intentString -> mFolderItems.get(intentString).size() + intentString)
+                    .sorted()
+                    .collect(Collectors.joining(","));
+        }
+
+        /** This id is not used in the DB is only used while doing the migration and it identifies
+         * an entry on each workspace. For example two calculator icons would have the same
+         * migration id even thought they have different database ids.
+         */
+        public String getEntryMigrationId() {
+            switch (itemType) {
+                case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
+                    return getFolderMigrationId();
+                case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET:
+                    return mProvider;
+                default:
+                    return mIntent;
+            }
+        }
     }
 }