🐛(backend) fix race condition in reconciliation requests CSV import

The call to the background task is now wrapped in a on_commit to ensure
that it isn't called before the save is finished, in order to avoid
race condition issues.

Author: Ash-Crow

CHANGELOG.md

@@ -12,6 +12,10 @@ and this project adheres to
 - ♿️(frontend) add contextual browser tab titles for docs routes #2120
 - ♿️(frontend) fix empty heading before section titles in HTML export #2125
 
+### Fixed
+
+- 🐛(backend) fix race condition in reconciliation requests CSV import #2153
+
 ## [v4.8.4] - 2026-03-25
 
 ### Added

src/backend/core/admin.py

@@ -1,7 +1,10 @@
 """Admin classes and registrations for core app."""
 
+from functools import partial
+
 from django.contrib import admin, messages
 from django.contrib.auth import admin as auth_admin
+from django.db import transaction
 from django.shortcuts import redirect
 from django.utils.translation import gettext_lazy as _
 
@@ -108,7 +111,9 @@ def save_model(self, request, obj, form, change):
         super().save_model(request, obj, form, change)
 
         if not change:
-            user_reconciliation_csv_import_job.delay(obj.pk)
+            transaction.on_commit(
+                partial(user_reconciliation_csv_import_job.delay, obj.pk)
+            )
             messages.success(request, _("Import job created and queued."))
         return redirect("..")