diff --git a/feathr_project/feathr/client.py b/feathr_project/feathr/client.py
index f21d37d23..759a33365 100644
--- a/feathr_project/feathr/client.py
+++ b/feathr_project/feathr/client.py
@@ -216,7 +216,7 @@ def build_features(self, anchor_list: List[FeatureAnchor] = [], derived_feature_
                                    f"definitions. Anchor name of {anchor} is already defined in {anchor_names[anchor.name]}")
             else:
                 anchor_names[anchor.name] = anchor
-            if anchor.source.name in source_names:
+            if anchor.source.name in source_names and (anchor.source is not source_names[anchor.source.name]):
                 raise RuntimeError(f"Source name should be unique but there are duplicate source names in your source "
                                    f"definitions. Source name of {anchor.source} is already defined in {source_names[anchor.source.name]}")
             else: