(schedules) fix creating schedules with the same name (#1463)

Closes #1375

packages/loot-core/migrations/1691233396000_add_schedule_next_date_tombstone.sql

+BEGIN TRANSACTION;
+
+ALTER TABLE schedules_next_date ADD COLUMN tombstone INTEGER DEFAULT 0;
+
+COMMIT;

packages/loot-core/src/server/schedules/app.ts

@@ -188,9 +188,10 @@ export async function setNextDate({
 // Methods
 
 async function checkIfScheduleExists(name, scheduleId) {
-  let idForName = await db.first('SELECT id from schedules WHERE name = ?', [
-    name,
-  ]);
+  let idForName = await db.first(
+    'SELECT id from schedules WHERE tombstone = 0 AND name = ?',
+    [name],
+  );
 
   if (idForName == null) {
     return false;

upcoming-release-notes/1463.md

+---
+category: Bugfix
+authors: [MatissJanis]
+---
+
+Fix creating a new schedule with the same name as a deleted schedule