Check for dates not migrating to smart dates fields after going live
mysql> SELECT d.bundle, d.entity_id FROM node__field_findit_dates d LEFT JOIN node__field_findit_opportunity_dates o ON d.entity_id = o.entity_id WHERE o.entity_id IS NULL;
+----------------+-----------+
| bundle | entity_id |
+----------------+-----------+
| findit_event | 8557 |
| findit_event | 9731 |
| findit_event | 10020 |
| findit_event | 10020 |
| findit_program | 1471 |
+----------------+-----------+