diff --git a/feed.go b/feed.go
index 4ef37a0..d5e0f3c 100644
--- a/feed.go
+++ b/feed.go
@@ -607,15 +607,14 @@ func chunk(args []any, qry func(int) (string, int), maxArgs int) iter.Seq2[strin
 func refreshLastTwt(ctx context.Context, db db) error {
 	qry := `
 	delete from last_twt_on;
-	insert into last_twt_on
+	insert into last_twt_on (feed_id, last_twt_on)
 		select distinct
 			feed_id,
 			max(strftime('%Y-%m-%dT%H:%M:%fZ', (substring(text, 1, instr(text, '	')-1)))) last_twt_on
 		from twts
-		group by feed_id
-	on conflict(feed_id);
+		group by feed_id;
 	delete from twt_mentions;
-	insert into twt_mentions
+	insert into twt_mentions (ulid, feed_id)
 		select distinct
 			ulid,
 			unhex(replace(trim(value,'{}'),'-','')) feed_id