diff --git a/desktop/src/features/messages/lib/useMentions.ts b/desktop/src/features/messages/lib/useMentions.ts
index 8175aca089..2bca5a0453 100644
--- a/desktop/src/features/messages/lib/useMentions.ts
+++ b/desktop/src/features/messages/lib/useMentions.ts
@@ -544,7 +544,6 @@ export function useMentions(
         appendUniqueName(current, trimmedName),
       );
       if (options?.isAgent) {
-        selectedAgentMentionPubkeysRef.current.add(normalizePubkey(pubkey));
         selectedAgentMentionPubkeysRef.current.add(normalizePubkey(pubkey));
         selectedAgentMentionNamesRef.current = appendUniqueName(
           selectedAgentMentionNamesRef.current,