diff --git a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/LaReferenciaDownloadLogs.java b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/LaReferenciaDownloadLogs.java
index a3ef14f20..1b4742543 100644
--- a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/LaReferenciaDownloadLogs.java
+++ b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/LaReferenciaDownloadLogs.java
@@ -171,14 +171,14 @@ public class LaReferenciaDownloadLogs {
 
 		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
 		// Setting the starting period
-		Calendar start = ExecuteWorkflow.startingLogPeriod;
+		Calendar start = (Calendar) ExecuteWorkflow.startingLogPeriod.clone();
 		logger.info("Starting period for log download: " + sdf.format(start.getTime()));
 
 		// Setting the ending period (last day of the month)
-		Calendar end = ExecuteWorkflow.endingLogPeriod;
+		Calendar end = (Calendar) ExecuteWorkflow.endingLogPeriod.clone();
 		end.add(Calendar.MONTH, +1);
 		end.add(Calendar.DAY_OF_MONTH, -1);
-		logger.info("Starting period for log download: " + sdf.format(end.getTime()));
+		logger.info("Ending period for log download: " + sdf.format(end.getTime()));
 
 		PreparedStatement st = ConnectDB
 			.getHiveConnection()
diff --git a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java
index abe99fc8d..4118ce013 100644
--- a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java
+++ b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikDownloadLogs.java
@@ -112,14 +112,14 @@ public class PiwikDownloadLogs {
 		logger.info("Downloading from repos with the followins piwikIds: " + piwikIdToVisit);
 
 		// Setting the starting period
-		Calendar start = ExecuteWorkflow.startingLogPeriod;
+		Calendar start = (Calendar) ExecuteWorkflow.startingLogPeriod.clone();
 		logger.info("Starting period for log download: " + sdf.format(start.getTime()));
 
 		// Setting the ending period (last day of the month)
-		Calendar end = ExecuteWorkflow.endingLogPeriod;
+		Calendar end = (Calendar) ExecuteWorkflow.endingLogPeriod.clone();
 		end.add(Calendar.MONTH, +1);
 		end.add(Calendar.DAY_OF_MONTH, -1);
-		logger.info("Starting period for log download: " + sdf.format(end.getTime()));
+		logger.info("Ending period for log download: " + sdf.format(end.getTime()));
 
 		for (int siteId : piwikIdToVisit) {
 
diff --git a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java
index a8a965866..c88601a6b 100644
--- a/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java
+++ b/dhp-workflows/dhp-usage-stats-update/src/main/java/eu/dnetlib/oa/graph/usagestats/export/PiwikStatsDB.java
@@ -475,8 +475,8 @@ public class PiwikStatsDB {
 			"WHERE p.source=d.piwik_id and p.id=ro.oid " +
 			"GROUP BY d.id, ro.id, month " +
 			"ORDER BY d.id, ro.id, month";
-		logger.info("Created downloads_stats_tmp table");
 		stmt.executeUpdate(sql);
+		logger.info("Created downloads_stats_tmp table");
 
 		logger.info("Dropping downloads_stats table");
 		String drop_pageviews_stats = "DROP TABLE IF EXISTS " +