diff --git a/goobi-viewer-indexer/pom.xml b/goobi-viewer-indexer/pom.xml
index 47c5b233..a89f0037 100644
--- a/goobi-viewer-indexer/pom.xml
+++ b/goobi-viewer-indexer/pom.xml
@@ -6,7 +6,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>io.goobi.viewer</groupId>
 	<artifactId>viewer-indexer</artifactId>
-	<version>22.07</version>
+	<version>22.08-SNAPSHOT</version>
 
 
 	<name>Goobi viewer - Indexer</name>
@@ -50,12 +50,12 @@
 		<icu.version>71.1</icu.version>
 		<imageio-openjpeg.version>0.6.2</imageio-openjpeg.version>
 		<log4j.version>2.18.0</log4j.version>
-		<jackson.version>2.13.3</jackson.version>
+		<jackson.version>2.13.4</jackson.version>
 		<jaxen.version>1.2.0</jaxen.version>
 		<jai.version>1.4.0</jai.version>
         <javax.mail.version>1.6.2</javax.mail.version>
 		<jdom2.version>2.0.6.1</jdom2.version>
-		<jsoup.version>1.15.2</jsoup.version>
+		<jsoup.version>1.15.3</jsoup.version>
 		<json.version>20220320</json.version>
 		<junit.version>4.13.2</junit.version>
 		<metadata-extractor.version>2.18.0</metadata-extractor.version>
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java
index 185e37c4..d81fb9dd 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java
@@ -23,6 +23,7 @@
 import java.util.Map.Entry;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.common.SolrInputDocument;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -59,8 +60,16 @@ public UsageStatisticsIndexer(Hotfolder hotfolder) {
      * @param sourceFile
      * @throws IOException
      * @throws FatalIndexerException
+     * @throws SolrServerException 
      */
-    public SolrInputDocument index(Path sourceFile) throws IOException, FatalIndexerException {
+    public SolrInputDocument index(Path sourceFile) throws IOException, FatalIndexerException, SolrServerException {
+        String solrDateString = getStatisticsDate(sourceFile);
+        if(statisticsExists(solrDateString)) {
+            logger.info("Don't index usage statistics for " + solrDateString + ": Statistics already exist for that date");
+            return null;
+        }
+        
+        
         String jsonString = Files.readString(sourceFile);
         if (StringUtils.isBlank(jsonString)) {
             throw new IllegalArgumentException("Usage statistics file {} is empty".replace("{}", sourceFile.toString()));
@@ -75,6 +84,7 @@ public SolrInputDocument index(Path sourceFile) throws IOException, FatalIndexer
             ISolrWriteStrategy writeStrategy = AbstractWriteStrategy.create(sourceFile, Collections.emptyMap(), this.hotfolder);
             writeStrategy.setRootDoc(rootDoc);
             writeStrategy.writeDocs(Configuration.getInstance().isAggregateRecords());
+            logger.info("Written usage statistics from " + sourceFile.toString() + " to index with IDDOC " + rootDoc.getFieldValue("IDDOC"));
             return rootDoc;
         } catch (JSONException | IndexerException e) {
             throw new IllegalArgumentException("Usage statistics file {} contains invalid json".replace("{}", sourceFile.toString()));
@@ -82,6 +92,17 @@ public SolrInputDocument index(Path sourceFile) throws IOException, FatalIndexer
 
     }
 
+    /**
+     * @param solrDateString
+     * @return
+     * @throws IOException 
+     * @throws SolrServerException 
+     */
+    private boolean statisticsExists(String solrDateString) throws SolrServerException, IOException {
+        String query = "+" + StatisticsLuceneFields.DATE + ":\"" + solrDateString + "\" +" + SolrConstants.DOCTYPE + ":" + StatisticsLuceneFields.USAGE_STATISTICS_DOCTYPE;
+        return hotfolder.getSearchIndex().getNumHits(query) > 0;
+    }
+
     /**
      * @param stats
      * @return
@@ -90,6 +111,7 @@ public SolrInputDocument index(Path sourceFile) throws IOException, FatalIndexer
     private IndexObject createIndexObject(DailyUsageStatistics stats) throws FatalIndexerException {
         IndexObject indexObj = new IndexObject(getNextIddoc(hotfolder.getSearchIndex()));
         indexObj.addToLucene(SolrConstants.IDDOC, Long.toString(indexObj.getIddoc()));
+        indexObj.addToLucene(SolrConstants.GROUPFIELD, Long.toString(indexObj.getIddoc()));
         indexObj.addToLucene(SolrConstants.DOCTYPE, StatisticsLuceneFields.USAGE_STATISTICS_DOCTYPE);
         indexObj.addToLucene(StatisticsLuceneFields.VIEWER_NAME, stats.getViewerName());
         indexObj.addToLucene(StatisticsLuceneFields.DATE, StatisticsLuceneFields.solrDateFormatter.format(stats.getDate().atStartOfDay()));
@@ -119,12 +141,11 @@ private IndexObject createIndexObject(DailyUsageStatistics stats) throws FatalIn
      * @throws FatalIndexerException 
      */
     public boolean removeFromIndex(Path sourceFile) throws FatalIndexerException {
-        String dateString = sourceFile.getFileName().toString().replaceAll("statistics-usage-([\\d-]+).\\w+", "$1");
-        LocalDate date = LocalDate.parse(dateString, DailyUsageStatistics.getDateformatter());
-        String solrDateString = StatisticsLuceneFields.solrDateFormatter.format(date.atStartOfDay());
-
+        String solrDateString = getStatisticsDate(sourceFile);
+        
         try {            
             String query = "+" + StatisticsLuceneFields.DATE + ":\"" + solrDateString + "\" +" + SolrConstants.DOCTYPE + ":" + StatisticsLuceneFields.USAGE_STATISTICS_DOCTYPE;
+            logger.info("Deleting usage statistics for " + StatisticsLuceneFields.DATE + ":" + solrDateString);
             return hotfolder.getSearchIndex().deleteByQuery(query);
         } finally {
             hotfolder.getSearchIndex().commit(false);            
@@ -132,4 +153,11 @@ public boolean removeFromIndex(Path sourceFile) throws FatalIndexerException {
 
     }
 
+    private String getStatisticsDate(Path sourceFile) {
+        String dateString = sourceFile.getFileName().toString().replaceAll("statistics-usage-([\\d-]+).\\w+", "$1");
+        LocalDate date = LocalDate.parse(dateString, DailyUsageStatistics.getDateformatter());
+        String solrDateString = StatisticsLuceneFields.solrDateFormatter.format(date.atStartOfDay());
+        return solrDateString;
+    }
+
 }
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Hotfolder.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Hotfolder.java
index fe568aa8..bf4a6aa9 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Hotfolder.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Hotfolder.java
@@ -480,7 +480,7 @@ public boolean scan() throws FatalIndexerException {
                 return true;
             }
             logger.trace("Hotfolder: Listing files...");
-            try (DirectoryStream<Path> stream = Files.newDirectoryStream(hotfolderPath, "*.{xml,delete,purge,docupdate,UPDATED}")) {
+            try (DirectoryStream<Path> stream = Files.newDirectoryStream(hotfolderPath, "*.{xml,json,delete,purge,docupdate,UPDATED}")) {
                 for (Path path : stream) {
                     // Only one file at a time right now
                     if (currentIndexer != null) {
@@ -648,10 +648,12 @@ private boolean handleSourceFile(Path sourceFile, boolean fromReindexQueue, Map<
             } else if (filename.endsWith(".json")) {
                 if (filename.startsWith(FILENAME_PREFIX_STATISTICS_USAGE)) {
                     addUsageStatisticsToIndex(sourceFile);
+                    Files.delete(sourceFile);
                 }
             } else if (filename.endsWith(FILENAME_EXTENSION_DELETE)) {
                 if (filename.startsWith(FILENAME_PREFIX_STATISTICS_USAGE)) {
                     removeUsageStatisticsFromIndex(sourceFile);
+                    Files.delete(sourceFile);
                 } else {
                     // DELETE
                     DataRepository[] repositories = dataRepositoryStrategy.selectDataRepository(null, sourceFile, null, searchIndex, oldSearchIndex);
@@ -661,6 +663,7 @@ private boolean handleSourceFile(Path sourceFile, boolean fromReindexQueue, Map<
             } else if (filename.endsWith(FILENAME_EXTENSION_PURGE)) {
                 if (filename.startsWith(FILENAME_PREFIX_STATISTICS_USAGE)) {
                     removeUsageStatisticsFromIndex(sourceFile);
+                    Files.delete(sourceFile);
                 } else {
                     // PURGE (delete with no "deleted" doc)
                     DataRepository[] repositories = dataRepositoryStrategy.selectDataRepository(null, sourceFile, null, searchIndex, oldSearchIndex);
@@ -1200,7 +1203,7 @@ private void addUsageStatisticsToIndex(Path sourceFile) {
         try {
             this.currentIndexer = new UsageStatisticsIndexer(this);
             ((UsageStatisticsIndexer) this.currentIndexer).index(sourceFile);
-        } catch (IOException | IllegalArgumentException | FatalIndexerException e) {
+        } catch (IOException | IllegalArgumentException | FatalIndexerException | SolrServerException e) {
             logger.error("Error indexing file {}. Reason: {}", sourceFile, e.getMessage());
         } finally {
             this.currentIndexer = null;
diff --git a/goobi-viewer-indexer/src/main/resources/config_indexer.xml b/goobi-viewer-indexer/src/main/resources/config_indexer.xml
index 5bb648fb..6ce78dc0 100644
--- a/goobi-viewer-indexer/src/main/resources/config_indexer.xml
+++ b/goobi-viewer-indexer/src/main/resources/config_indexer.xml
@@ -3420,7 +3420,20 @@
                         </list>
                 </MD_PI_ARK>
 
-
-
+                <MD_USEANDREPRODUCTIONLICENSE>
+                        <list>
+                                <item>
+                                        <xpath>
+                                                <list>
+                                                        <item>mets:xmlData/mods:mods/mods:accessCondition[@type="use and reproduction"]</item>
+                                                        <item>dc:rights[contains(text(),'http')]</item>
+                                                        <item>mets:xmlData/mods:mods/mods:accessCondition[@lang="eng"][@type='work-license']</item>
+                                                </list>
+                                        </xpath>
+                                        <addToDefault>true</addToDefault>
+                                        <addUntokenizedVersion>false</addUntokenizedVersion>
+                                </item>
+                        </list>
+                </MD_USEANDREPRODUCTIONLICENSE>
 	</fields>
 </root>