diff --git a/.gitignore b/.gitignore
index efc5aac..31df00f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,4 +21,5 @@ info_dir/*
 docs/build/*
 
 blazegraph*
-rules.log
\ No newline at end of file
+rules.log
+oc_ocdm/test/prov/prov_counter.db
\ No newline at end of file
diff --git a/oc_ocdm/test/prov/prov_counter.db b/oc_ocdm/test/prov/prov_counter.db
deleted file mode 100644
index 702c190..0000000
Binary files a/oc_ocdm/test/prov/prov_counter.db and /dev/null differ
diff --git a/oc_ocdm/test/prov/test_prov_set.py b/oc_ocdm/test/prov/test_prov_set.py
index 771310e..167cd78 100644
--- a/oc_ocdm/test/prov/test_prov_set.py
+++ b/oc_ocdm/test/prov/test_prov_set.py
@@ -31,7 +31,10 @@ class TestProvSet(unittest.TestCase):
 
     def setUp(self):
         self.graph_set = GraphSet("http://test/", "./info_dir/", "", False)
-        self.prov_set = ProvSet(self.graph_set, "http://test/", "./info_dir/", False, custom_counter_handler=SqliteCounterHandler('oc_ocdm/test/prov/prov_counter.db'), supplier_prefix="")
+        counter_db_path = 'oc_ocdm/test/prov/prov_counter.db'
+        if os.path.exists(counter_db_path):
+            os.remove(counter_db_path)
+        self.prov_set = ProvSet(self.graph_set, "http://test/", "./info_dir/", False, custom_counter_handler=SqliteCounterHandler(counter_db_path), supplier_prefix="")
         self.cur_time = 1607375859.846196
         self.cur_time_str = '2020-12-07T21:17:39+00:00'
 
diff --git a/virtuoso-opensource/database/virtuoso.trx b/virtuoso-opensource/database/virtuoso.trx
index 9b6a0e6..d5147f7 100644
Binary files a/virtuoso-opensource/database/virtuoso.trx and b/virtuoso-opensource/database/virtuoso.trx differ