Flaky test: tests/sentry/deletions/tasks/test_hybrid_cloud.py::TestCrossDatabaseTombstoneCascadeBehavior::test_cross_db_deletion

Failing test: `tests/sentry/deletions/tasks/test_hybrid_cloud.py::TestCrossDatabaseTombstoneCascadeBehavior::test_cross_db_deletion` Sentry sha: 02e8ded902342f5b18db32c91f8f4f174afc4551 Run: https://github.com/getsentry/sentry/actions/runs/22243447656 ``` .venv/lib/python3.13/site-packages/django/db/backends/utils.py:105: in _execute return self.cursor.execute(sql, params) src/sentry/db/postgres/decorators.py:16: in inner return func(self, *args, **kwargs) src/sentry/db/postgres/base.py:95: in execute return self.cursor.execute(sql, params) E psycopg2.errors.UniqueViolation: duplicate key value violates unique constraint "sentry_monitor_pkey" E DETAIL: Key (id)=(9) already exists. The above exception was the direct cause of the following exception: tests/sentry/deletions/tasks/test_hybrid_cloud.py:409: in test_cross_db_deletion Monitor.objects.create( src/sentry/silo/base.py:158: in override return original_method(*args, **kwargs) .venv/lib/python3.13/site-packages/django/db/models/manager.py:87: in manager_method return getattr(self.get_queryset(), name)(*args, **kwargs) src/sentry/silo/base.py:158: in override return original_method(*args, **kwargs) .venv/lib/python3.13/site-packages/django/db/models/query.py:665: in create obj.save(force_insert=True, using=self.db) src/sentry/silo/base.py:158: in override return original_method(*args, **kwargs) src/sentry/monitors/models.py:298: in save return super().save(*args, **kwargs) .venv/lib/python3.13/site-packages/django/db/models/base.py:902: in save self.save_base( src/sentry/silo/base.py:158: in override return original_method(*args, **kwargs) .venv/lib/python3.13/site-packages/django/db/models/base.py:1008: in save_base updated = self._save_table( .ve…