diff --git a/htroot/Crawler_p.java b/htroot/Crawler_p.java
index 97aa39c85..668599b8a 100644
--- a/htroot/Crawler_p.java
+++ b/htroot/Crawler_p.java
@@ -217,6 +217,9 @@ public class Crawler_p {
                 if (crawlName.endsWith(",")) crawlName = crawlName.substring(0, crawlName.length() - 1);
                 if (crawlName.length() == 0 && sitemapURLStr.length() > 0) crawlName = "sitemap loader for " + sitemapURLStr;
                 
+                // delete old robots entries
+                for (DigestURL ru: rootURLs) sb.robots.delete(ru);
+                
                 // set the crawl filter
                 String ipMustMatch = post.get("ipMustmatch", CrawlProfile.MATCH_ALL_STRING);
                 final String ipMustNotMatch = post.get("ipMustnotmatch", CrawlProfile.MATCH_NEVER_STRING);
diff --git a/source/net/yacy/crawler/robots/RobotsTxt.java b/source/net/yacy/crawler/robots/RobotsTxt.java
index 45bca6431..e648f68f2 100644
--- a/source/net/yacy/crawler/robots/RobotsTxt.java
+++ b/source/net/yacy/crawler/robots/RobotsTxt.java
@@ -185,7 +185,24 @@ public class RobotsTxt {
 
         return robotsTxt4Host;
     }
-
+    
+    public void delete(final MultiProtocolURL theURL) {
+        final String urlHostPort = getHostPort(theURL);
+        if (urlHostPort == null) return;
+        final BEncodedHeap robotsTable;
+        try {
+            robotsTable = this.tables.getHeap(WorkTables.TABLE_ROBOTS_NAME);
+        } catch (final IOException e1) {
+            log.severe("tables not available", e1);
+            return;
+        }
+        if (robotsTable == null) return;
+        try {
+            robotsTable.delete(robotsTable.encodedKey(urlHostPort));
+        } catch (IOException e) {
+        }
+    }
+    
     public void ensureExist(final MultiProtocolURL theURL, final ClientIdentification.Agent agent, boolean concurrent) {
         if (theURL.isLocal()) return;
         final String urlHostPort = getHostPort(theURL);
diff --git a/source/net/yacy/search/schema/CollectionConfiguration.java b/source/net/yacy/search/schema/CollectionConfiguration.java
index 2e6e09650..a4812096c 100644
--- a/source/net/yacy/search/schema/CollectionConfiguration.java
+++ b/source/net/yacy/search/schema/CollectionConfiguration.java
@@ -1492,7 +1492,9 @@ public class CollectionConfiguration extends SchemaConfiguration implements Seri
             Collection<Object> c = doc.getFieldValues(CollectionSchema.collection_sxt.getSolrFieldName());
             if (c != null) for (Object cn: c) if (cn != null) this.collections.put((String) cn, QueryParams.catchall_pattern);
             this.failReason = (String) doc.getFieldValue(CollectionSchema.failreason_s.getSolrFieldName());
-            this.failType = FailType.valueOf((String) doc.getFieldValue(CollectionSchema.failtype_s.getSolrFieldName()));
+            String fts = (String) doc.getFieldValue(CollectionSchema.failtype_s.getSolrFieldName());
+            if (fts == null) ConcurrentLog.warn("CollectionConfiguration", "no fail type given for URL " + this.digestURL.toNormalform(true));
+            this.failType = fts == null ? FailType.fail : FailType.valueOf(fts);
             this.httpstatus = (Integer) doc.getFieldValue(CollectionSchema.httpstatus_i.getSolrFieldName());
             this.failtime = (Date) doc.getFieldValue(CollectionSchema.load_date_dt.getSolrFieldName());
         }