diff --git a/modules/pubmed/biblio_pm.module b/modules/pubmed/biblio_pm.module
index a68aee7..34613c3 100644
--- a/modules/pubmed/biblio_pm.module
+++ b/modules/pubmed/biblio_pm.module
@@ -411,9 +411,14 @@ function biblio_pm_node_insert($node) {
 }
 
 function biblio_pm_node_update($node) {
+  // make sure stale entries are deleted
+  db_delete('biblio_pubmed')
+    ->condition('nid', $node->nid)
+    ->execute();
   if (isset($node->biblio_pubmed_id) && !empty($node->biblio_pubmed_id)) {
+    // write the new data
     $node->biblio_pm_changed = time();
-    drupal_write_record('biblio_pubmed', $node, 'nid');
+    drupal_write_record('biblio_pubmed', $node);
   }
   if (isset($node->biblio_pubmed_grants) && is_array($node->biblio_pubmed_grants) && !empty($node->biblio_pubmed_grants)) {
     db_delete('biblio_pubmed_grant_info')