diff --git a/.classpath b/.classpath
index 9e4aea59b..139752929 100644
--- a/.classpath
+++ b/.classpath
@@ -68,7 +68,7 @@
 	<classpathentry kind="lib" path="lib/httpmime-4.4.1.jar"/>
 	<classpathentry kind="lib" path="lib/noggit-0.6.jar"/>
 	<classpathentry kind="lib" path="lib/solr-core-5.2.0.jar" sourcepath="/Volumes/Uno/noBackup/Downloads/solr-5.2.0/solr/core/src/java"/>
-	<classpathentry kind="lib" path="lib/solr-solrj-5.2.0.jar" sourcepath="/Volumes/Uno/noBackup/Downloads/solr-5.2.0/solr/solrj/src/java"/>
+	<classpathentry kind="lib" path="lib/solr-solrj-5.2.0.jar" sourcepath="/Users/admin/Downloads/solr-5.2.1/solr/solrj/src/java"/>
 	<classpathentry kind="lib" path="lib/stax2-api-3.1.4.jar"/>
 	<classpathentry kind="lib" path="lib/woodstox-core-asl-4.4.1.jar"/>
 	<classpathentry kind="lib" path="lib/lucene-analyzers-common-5.2.0.jar"/>
diff --git a/source/net/yacy/cora/federate/solr/SchemaConfiguration.java b/source/net/yacy/cora/federate/solr/SchemaConfiguration.java
index 9c563bf07..f57068dc9 100644
--- a/source/net/yacy/cora/federate/solr/SchemaConfiguration.java
+++ b/source/net/yacy/cora/federate/solr/SchemaConfiguration.java
@@ -112,6 +112,14 @@ public class SchemaConfiguration extends Configuration implements Serializable {
         return this.contains(field.getSolrFieldName());
     }
 
+    public void remove(final SolrInputDocument doc, final SchemaDeclaration key) {
+        key.remove(doc);
+    }
+    
+    public void remove(final SolrInputDocument doc, final String key) {
+        doc.removeField(key);
+    }
+
     public void add(final SolrInputDocument doc, final SchemaDeclaration key, final String value) {
         assert !key.isMultiValued() : "key = " + key.getSolrFieldName();
         if ((isEmpty() || contains(key)) && (!this.lazy || (value != null && !value.isEmpty()))) key.add(doc, value);
diff --git a/source/net/yacy/cora/federate/solr/SchemaDeclaration.java b/source/net/yacy/cora/federate/solr/SchemaDeclaration.java
index 56d4c9655..7bcc53e53 100644
--- a/source/net/yacy/cora/federate/solr/SchemaDeclaration.java
+++ b/source/net/yacy/cora/federate/solr/SchemaDeclaration.java
@@ -72,5 +72,7 @@ public interface SchemaDeclaration {
     public void add(final SolrInputDocument doc, final double value);
 
     public void add(final SolrInputDocument doc, final boolean value);
+    
+    public void remove(final SolrInputDocument doc);
 
 }
\ No newline at end of file
diff --git a/source/net/yacy/search/schema/CollectionConfiguration.java b/source/net/yacy/search/schema/CollectionConfiguration.java
index 04b6a7884..7211a363a 100644
--- a/source/net/yacy/search/schema/CollectionConfiguration.java
+++ b/source/net/yacy/search/schema/CollectionConfiguration.java
@@ -101,6 +101,7 @@ import org.apache.solr.common.SolrDocument;
 import org.apache.solr.common.SolrDocumentList;
 import org.apache.solr.common.SolrException;
 import org.apache.solr.common.SolrInputDocument;
+import org.apache.solr.common.SolrInputField;
 import org.eclipse.jetty.util.ConcurrentHashSet;
 
 
@@ -1006,6 +1007,10 @@ public class CollectionConfiguration extends SchemaConfiguration implements Seri
     }
     
     public void enrich(SolrInputDocument doc, List<String> synonyms, Map<String, Set<String>> genericFacets) {
+        remove(doc, CollectionSchema.vocabularies_sxt); // delete old values
+        for (SolrInputField sif: doc) {
+            if (sif.getName().startsWith(CollectionSchema.VOCABULARY_PREFIX)) remove(doc, sif.getName());
+        }
         if (this.isEmpty() || contains(CollectionSchema.vocabularies_sxt)) {
             // write generic navigation
             // there are no pre-defined solr fields for navigation because the vocabulary is generic
@@ -1027,6 +1032,7 @@ public class CollectionConfiguration extends SchemaConfiguration implements Seri
             }
             if (vocabularies.size() > 0) add(doc, CollectionSchema.vocabularies_sxt, vocabularies);
         }
+        remove(doc, CollectionSchema.synonyms_sxt); // delete old values
         if (this.isEmpty() || contains(CollectionSchema.synonyms_sxt)) {
             if (synonyms.size() > 0) add(doc, CollectionSchema.synonyms_sxt, synonyms);
         }
diff --git a/source/net/yacy/search/schema/CollectionSchema.java b/source/net/yacy/search/schema/CollectionSchema.java
index c23f5640a..85cb1a091 100644
--- a/source/net/yacy/search/schema/CollectionSchema.java
+++ b/source/net/yacy/search/schema/CollectionSchema.java
@@ -341,7 +341,7 @@ public enum CollectionSchema implements SchemaDeclaration {
     public final String getComment() {
         return this.comment;
     }
-
+    
     @Override
     public final void add(final SolrInputDocument doc, final String value) {
         assert !this.isMultiValued();
@@ -431,5 +431,9 @@ public enum CollectionSchema implements SchemaDeclaration {
         doc.setField(this.getSolrFieldName(), value);
     }
 
+    @Override
+    public final void remove(final SolrInputDocument doc) {
+        doc.removeField(this.getSolrFieldName());
+    }
 }
 
diff --git a/source/net/yacy/search/schema/WebgraphSchema.java b/source/net/yacy/search/schema/WebgraphSchema.java
index 8f2ceded9..18837ad58 100644
--- a/source/net/yacy/search/schema/WebgraphSchema.java
+++ b/source/net/yacy/search/schema/WebgraphSchema.java
@@ -284,5 +284,9 @@ public enum WebgraphSchema implements SchemaDeclaration {
         doc.setField(this.getSolrFieldName(), value);
     }
 
+    @Override
+    public final void remove(final SolrInputDocument doc) {
+        doc.removeField(this.getSolrFieldName());
+    }
 }