Fix kafka migration script again (#4043)

db/patch-fix-kafka-producer-booleans.sql

@@ -15,12 +15,14 @@ ALTER TABLE monitor
 ALTER TABLE monitor
     ADD COLUMN kafka_producer_allow_auto_topic_creation BOOLEAN default 0 NOT NULL;
 
+-- These SQL is still not fully safe. See https://github.com/louislam/uptime-kuma/issues/4039.
+
 -- Set bring old values from `_old` COLUMNs to correct ones
-UPDATE monitor SET kafka_producer_allow_auto_topic_creation = monitor.kafka_producer_allow_auto_topic_creation_old
-    WHERE monitor.kafka_producer_allow_auto_topic_creation_old IS NOT NULL;
+-- UPDATE monitor SET kafka_producer_allow_auto_topic_creation = monitor.kafka_producer_allow_auto_topic_creation_old
+-- WHERE monitor.kafka_producer_allow_auto_topic_creation_old IS NOT NULL;
 
-UPDATE monitor SET kafka_producer_ssl = monitor.kafka_producer_ssl_old
-    WHERE monitor.kafka_producer_ssl_old IS NOT NULL;
+-- UPDATE monitor SET kafka_producer_ssl = monitor.kafka_producer_ssl_old
+-- WHERE monitor.kafka_producer_ssl_old IS NOT NULL;
 
 -- Remove old COLUMNs
 ALTER TABLE monitor