diff --git a/src/tools.py b/src/tools.py
index ec90361fc..5ec556012 100644
--- a/src/tools.py
+++ b/src/tools.py
@@ -671,6 +671,15 @@ def tools_migrations_run(
 
         raise YunohostValidationError("migrations_no_such_migration", id=target)
 
+    # Dirty hack to mark the bullseye->bookworm as done ...
+    # it may still be marked as 'pending' if for some reason the migration crashed,
+    # but the admins ran 'apt full-upgrade' to manually finish the migration
+    # ... in which case it won't be magically flagged as 'done' until here
+    migrate_to_bookworm = get_matching_migration("migrate_to_bookworm")
+    if migrate_to_bookworm.state == "pending":
+        migrate_to_bookworm.state = "done"
+        _write_migration_state(migrate_to_bookworm.id, "done")
+
     # auto, skip and force are exclusive options
     if auto + skip + force_rerun > 1:
         raise YunohostValidationError("migrations_exclusive_options")