diff --git a/multi_user/__init__.py b/multi_user/__init__.py
index 8f4011e..e15a003 100644
--- a/multi_user/__init__.py
+++ b/multi_user/__init__.py
@@ -44,7 +44,7 @@ from . import environment
 
 
 DEPENDENCIES = {
-    ("replication", '0.1.30'),
+    ("replication", '0.1.31'),
 }
 
 
diff --git a/multi_user/bl_types/bl_file.py b/multi_user/bl_types/bl_file.py
index 120048d..26400c3 100644
--- a/multi_user/bl_types/bl_file.py
+++ b/multi_user/bl_types/bl_file.py
@@ -134,6 +134,8 @@ class BlFile(ReplicatedDatablock):
         if self.preferences.clear_memory_filecache:
             return False
         else:
+            if not self.instance:
+                return False
             memory_size = sys.getsizeof(self.data['file'])-33
             disk_size = self.instance.stat().st_size
             return memory_size != disk_size
diff --git a/multi_user/bl_types/bl_image.py b/multi_user/bl_types/bl_image.py
index 3a248c6..901a201 100644
--- a/multi_user/bl_types/bl_image.py
+++ b/multi_user/bl_types/bl_image.py
@@ -66,7 +66,7 @@ class BlImage(BlDatablock):
         loader = Loader()
         loader.load(data, target)
 
-        target.source = data['source']
+        target.source = 'FILE'
         target.filepath_raw = get_filepath(data['filename'])
         color_space_name = data["colorspace_settings"]["name"]
 
@@ -86,7 +86,7 @@ class BlImage(BlDatablock):
         dumper.depth = 2
         dumper.include_filter = [
             "name",
-            'source',
+            # 'source',
             'size',
             'height',
             'alpha',