Index: b/src/crlcache.c
===================================================================
--- b/src/crlcache.c
+++ b/src/crlcache.c
@@ -2160,7 +2160,35 @@
      it as deleted. We better use a loop, just in case duplicates got
      somehow into the list. */
   for (e = cache->entries; (e=find_entry (e, entry->issuer_hash)); e = e->next)
-    e->deleted = 1;
+    {
+      /* Don't ovewrite old CRL having greather crl_number by new CRL with
+       * lesser clr_number. E.g. Some DP names are not synchronized properly. */
+      if (entry->crl_number && e->crl_number &&
+              strcmp(entry->crl_number, e->crl_number) < 0)
+        {
+          log_info ("new CRL has lesser number (0x%s) than CRL stored "
+                    "in cache already (0x%s), ingnoring new one\n",
+                   entry->crl_number, e->crl_number);
+          /* Mask this problem from caller if in-cache CRL is still usable */
+          get_isotime (current_time);
+          if (e->invalid || strcmp (e->next_update, current_time) < 0)
+            {
+              if (!err2)
+                  err2 = gpg_error (GPG_ERR_CRL_TOO_OLD);
+              log_info ("this fact will be still reported as error "
+                        "because no other usable CRL is available\n");
+            }
+          else
+            {
+              err2 = 0;
+              log_info ("this fact will be masked because another "
+                        "usable CRL is available\n");
+            }
+          goto leave;
+        }
+      else
+          e->deleted = 1;
+    }
   
   /* Rename the temporary DB to the real name. */
   newfname = make_db_file_name (entry->issuer_hash);