diff --git a/music_kraken/objects/parents.py b/music_kraken/objects/parents.py
index a90576b..7b71269 100644
--- a/music_kraken/objects/parents.py
+++ b/music_kraken/objects/parents.py
@@ -164,15 +164,7 @@ class OuterProxy:
             self._add_other_db_objects(key, value)
 
     def __hash__(self):
-        """
-        :raise: IsDynamicException
-        :return:
-        """
-
-        if self.dynamic:
-            return id(self._inner)
-
-        return self.id
+        return id(self)
 
     def __eq__(self, other: Any):
         return self.__hash__() == other.__hash__()
@@ -189,7 +181,6 @@ class OuterProxy:
         if __other is None:
             return
 
-        object_trace(f"merging {type(self).__name__} [{self.title_string} | {self.id}] with {type(__other).__name__} [{__other.title_string} | {__other.id}] called by [{' | '.join(f'{s.function} {Path(s.filename).name}:{str(s.lineno)}' for s in inspect.stack()[1:4])}]")
 
         a = self
         b = __other
@@ -201,7 +192,8 @@ class OuterProxy:
         if len(b._inner._refers_to_instances) > len(a._inner._refers_to_instances):
             a, b = b, a
 
-        a._inner.__merge__(b._inner, override=override)
+        object_trace(f"merging {type(a).__name__} [{a.title_string} | {a.id}] with {type(b).__name__} [{b.title_string} | {b.id}] called by [{' | '.join(f'{s.function} {Path(s.filename).name}:{str(s.lineno)}' for s in inspect.stack()[1:5])}]")
+        
         for collection, child_collection in b._inner._is_collection_child.items():
             try:
                 collection.children.remove(child_collection)
@@ -213,13 +205,14 @@ class OuterProxy:
                 collection.parents.remove(parent_collection)
             except ValueError:
                 pass
-        
+
         old_inner = b._inner
-        a._inner._refers_to_instances.update(b._inner._refers_to_instances)
 
-        for instance in b._inner._refers_to_instances:
+        for instance in b._inner._refers_to_instances.copy():
             instance._inner = a._inner
+            a._inner._refers_to_instances.add(instance)
 
+        a._inner.__merge__(old_inner, override=override)
         del old_inner
 
     def __merge__(self, __other: Optional[OuterProxy], override: bool = False):
diff --git a/music_kraken/objects/source.py b/music_kraken/objects/source.py
index 5a8a560..bb2e9e3 100644
--- a/music_kraken/objects/source.py
+++ b/music_kraken/objects/source.py
@@ -104,14 +104,7 @@ class Source(OuterProxy):
             ('url', self.url),
             ('audio_url', self.audio_url),
         ]
-
-    def __merge__(self, __other: Source, override: bool = False):
-        if override:
-            self.audio_url = __other.audio_url
-
-        if self.audio_url is None or (override and __other.audio_url is not None):
-            self.audio_url = __other.audio_url
-
+        
     def __str__(self):
         return self.__repr__()