helper and groupee are not hashes. They correspond to the group type on the rune.

mbEditorPro2.0/arcane/objects/ArcRune.py

@@ -332,10 +332,10 @@ class ArcRune(ArcItem):
             self.rune_enemy_monster_types.append(string_to_hash(monster))
         self.rune_groupee_monster_types = []
         for monster in data['rune_groupee_monster_types']:
-            self.rune_groupee_monster_types.append(string_to_hash(monster))
+            self.rune_groupee_monster_types.append(monster)
         self.rune_helper_monster_types = []
         for monster in data['rune_helper_monster_types']:
-            self.rune_helper_monster_types.append(string_to_hash(monster))
+            self.rune_helper_monster_types.append(monster)
         self.rune_not_enemy_monster_types = []
         for monster in data['rune_not_enemy_monster_types']:
             self.rune_not_enemy_monster_types.append(string_to_hash(monster))
@@ -422,10 +422,10 @@ class ArcRune(ArcItem):
             data['rune_enemy_monster_types'].append(hash_to_string(monster))
         data['rune_groupee_monster_types'] = []
         for monster in self.rune_groupee_monster_types:
-            data['rune_groupee_monster_types'].append(hash_to_string(monster))
+            data['rune_groupee_monster_types'].append(monster)
         data['rune_helper_monster_types'] = []
         for monster in self.rune_helper_monster_types:
-            data['rune_helper_monster_types'].append(hash_to_string(monster))
+            data['rune_helper_monster_types'].append(monster)
         data['rune_not_enemy_monster_types'] = []
         for monster in self.rune_not_enemy_monster_types:
             data['rune_not_enemy_monster_types'].append(hash_to_string(monster))