diff --git a/swh/storage/migrate_extrinsic_metadata.py b/swh/storage/migrate_extrinsic_metadata.py
--- a/swh/storage/migrate_extrinsic_metadata.py
+++ b/swh/storage/migrate_extrinsic_metadata.py
@@ -1064,7 +1064,8 @@
         if type_ == "dsc":
             assert origin is None
             origins = debian_origins_from_row(row, storage)
-            assert origins, row
+            if not origins:
+                print("Missing Debian origin for revision: {hash_to_hex(row['id'])}")
         else:
             origins = [origin]