--- a/plugins/mod_pep.lua	Mon Aug 06 18:33:33 2018 +0200
+++ b/plugins/mod_pep.lua	Sun Aug 05 01:53:48 2018 +0200
@@ -362,8 +362,9 @@
 	end
 
 	for node in nodes - current do
-		service:add_subscription(node, recipient, recipient, { presence = true });
-		resend_last_item(recipient, node, service);
+		if service:add_subscription(node, recipient, recipient, { presence = true }) then
+			resend_last_item(recipient, node, service);
+		end
 	end
 
 	if nodes == empty_set or nodes:empty() then