diff --git a/main.go b/main.go
index 9dabb27..a85ca72 100644
--- a/main.go
+++ b/main.go
@@ -379,7 +379,7 @@ func actionSyncToServer(w http.ResponseWriter, r *http.Request) { // {{{
 
 	_, err = db.Exec(`CALL add_nodes($1, $2::uuid, $3::jsonb)`, user.UserID, user.ClientUUID, request.NodeData)
 	if err != nil {
-		Log.Error("sync", "error", err)
+		Log.Error("sync", "error", err, "user_id", user.UserID, "client_uuid", user.ClientUUID, "node_data", request.NodeData)
 		httpError(w, err)
 		return
 	}