diff --git a/mt7921/main.c b/mt7921/main.c
index bf3fadc5..b0fa42a2 100644
--- a/mt7921/main.c
+++ b/mt7921/main.c
@@ -531,7 +531,13 @@ static int mt7921_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	} else {
 		if (idx == *wcid_keyidx)
 			*wcid_keyidx = -1;
-		goto out;
+
+		/* For security issue we don't trigger the key deletion when
+		 * reassociating. But we should trigger the deletion process
+		 * to avoid using incorrect cipher after disconnection,
+		 */
+		if (vif->type != NL80211_IFTYPE_STATION || vif->cfg.assoc)
+			goto out;
 	}
 
 	mt76_wcid_key_setup(&dev->mt76, wcid, key);