diff --git a/core-private-routes.md b/core-private-routes.md
index 7e495e2..2a77b24 100644
--- a/core-private-routes.md
+++ b/core-private-routes.md
@@ -112,8 +112,8 @@ The config returned by `GET /node/config/latest` has this structure:
 
 Important notes:
 
-- `clientMap` maps subscription link UUIDs to the user and subscription — used for xray traffic attribution.
-- `mtprotoClientMap` maps MTProto link UUIDs to the user and subscription — used for telemt traffic attribution.
+- `clientMap` maps subscription-link IDs (lsId) to the user and subscription — used for both xray and telemt traffic/online-IP attribution (the telemt username now mirrors the xray email `u{userId}.l{linkId}.s{lsId}.i{protoId}`).
+- `mtprotoClientMap` (lsUuid-keyed) is retained on the wire for backward compatibility but is no longer used for attribution.
 - `services.xray` contains the Xray inbounds, routing, and outbounds for the node.
 - `services.mtproto` contains MTProto inbounds for `telemt`.
 - The node stores the current revision and client maps locally after a successful apply.