lnwallet: add log message for edge case

also see discussion in #7108

docs/release-notes/release-notes-0.16.0.md

@@ -115,6 +115,9 @@ current gossip sync query status.
 * [Fix the issue of ghost UTXOs not being detected as spent if they were created
   with an external tool](https://github.com/lightningnetwork/lnd/pull/7243).
 
+* [Add log message for edge
+  case](https://github.com/lightningnetwork/lnd/pull/7115).
+
 ## Build
 
 [The project has updated to Go
@@ -357,6 +360,7 @@ refactor the itest for code health and maintenance.
 * andreihod
 * Antoni Spaanderman
 * Carla Kirk-Cohen
+* Carsten Otto
 * Conner Babinchak
 * cutiful
 * Daniel McNally