legacymigrate: fix mx_room_state migration on sqlite

cmd/mautrix-telegram/legacymigrate.sql

@@ -262,6 +262,9 @@ CREATE TABLE new_mx_room_state (
 INSERT INTO new_mx_room_state (room_id, encryption, power_levels, create_event, members_fetched)
 SELECT room_id, encryption, power_levels, create_event, COALESCE(has_full_member_list, false)
 FROM mx_room_state;
+
+DROP TABLE mx_room_state;
+ALTER TABLE new_mx_room_state RENAME TO mx_room_state;
 -- end only sqlite
 
 ALTER TABLE mx_user_profile ADD COLUMN name_skeleton bytea;

pkg/connector/store/upgrades/09-legacy-migrate-fix.go

@@ -0,0 +1,40 @@
+// mautrix-telegram - A Matrix-Telegram puppeting bridge.
+// Copyright (C) 2026 Tulir Asokan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package upgrades
+
+import (
+	"context"
+
+	"go.mau.fi/util/dbutil"
+)
+
+func init() {
+	Table.Register(-1, 9, 2, "Fix bug in legacy migration", dbutil.TxnModeOn, func(ctx context.Context, db *dbutil.Database) error {
+		if db.Dialect != dbutil.SQLite {
+			return nil
+		}
+		exists, err := db.TableExists(ctx, "new_mx_room_state")
+		if !exists || err != nil {
+			return err
+		}
+		_, err = db.Exec(ctx, `
+			DROP TABLE mx_room_state;
+			ALTER TABLE new_mx_room_state RENAME TO mx_room_state;
+		`)
+		return err
+	})
+}