diff --git a/CHANGELOG.md b/CHANGELOG.md
index 899067a..4c3a0d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Fixed
 
+- Fixes [#1548](https://github.com/eamodio/vscode-gitlens/issues/1548) - "Don't show again" on debug log warning doesn't work
 - Fixes [#1449](https://github.com/eamodio/vscode-gitlens/issues/1449) - Configured remotes not showing up in quickpick menu when opening commit on remote
 - Fixes issues where auto-linking of GitHub 3rd party issue links didn't always work
 - Fixes issue with long commit messages on rebase editor
diff --git a/src/messages.ts b/src/messages.ts
index 59b6365..4481e5b 100644
--- a/src/messages.ts
+++ b/src/messages.ts
@@ -238,7 +238,7 @@ export class Messages {
 	}
 
 	private static suppressedMessage(suppressionKey: SuppressedMessages) {
-		const messages = configuration.get('advanced.messages');
+		const messages = { ...configuration.get('advanced.messages') };
 
 		messages[suppressionKey] = true;