diff --git a/processing/loaddata.py b/processing/loaddata.py
index 9b660ed..06c6476 100755
--- a/processing/loaddata.py
+++ b/processing/loaddata.py
@@ -543,7 +543,7 @@ def differential_mode(index, endpoint, fmt, collection=None, delete=False):
     # Ids to remove
     if delete is True:
         logger.info("Running remove records process.")
-        remove_ids = ind_ids - art_ids
+        remove_ids = set([i.split('_')[1] for i in ind_ids]) - set([i.split('_')[1] for i in art_ids])
         total_to_remove = len(remove_ids)
         logger.info("Removing (%d) documents to search index." % total_to_remove)
         if endpoint == 'article' and total_to_remove > 1000:
diff --git a/setup.py b/setup.py
index 7a0a803..c87ead2 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
 
 setup(
     name="publication",
-    version='1.30.0',
+    version='1.30.1',
     description="A SciELO RPC server and API to retrieve publication statistics from the SciELO Network ",
     author="SciELO",
     author_email="scielo-dev@googlegroups.com",