--- a/servers/slapd/bconfig.c	2015-06-02 14:37:10.930873419 +0200
+++ b/servers/slapd/bconfig.c	2015-06-02 14:37:35.105233408 +0200
@@ -4679,7 +4679,7 @@
 	if ( ce_type == Cft_Database )
 		nsibs--;
 
-	if ( index != nsibs ) {
+	if ( index != nsibs || isfrontend) {
 		if ( gotindex ) {
 			if ( index < nsibs ) {
 				if ( tailindex ) return LDAP_NAMING_VIOLATION;