diff --git a/relbench/datasets/event.py b/relbench/datasets/event.py
index 003fbc62..09cc95dd 100644
--- a/relbench/datasets/event.py
+++ b/relbench/datasets/event.py
@@ -81,6 +81,13 @@ def make_db(self) -> Database:
                 user=lambda df: df["user"].astype(int),
                 friend=lambda df: df["friend"].astype(int),
             )
+
+            # Some friends are not present in the user table, so we drop those friends
+            # in the user_friends table
+            user_friends_flattened_df = user_friends_flattened_df.merge(
+                users_df, how="inner", left_on="friend", right_on="user_id"
+            )
+            user_friends_flattened_df = user_friends_flattened_df[["user", "friend"]]
             user_friends_flattened_df.to_csv(
                 os.path.join(path, "user_friends_flattened.csv")
             )