v.25.12Bug Fix (user-visible misbehavior in an official stable release)

When Kafka table was created

In case when Kafka table was created with a setting kafka_handle_error_mode = 'dead_letter_queue' and the table system.dead_letter_queue is not configured the server may have crashed. This behaviour is fixed. Resolves #87573. #90064 (Nikita Mikhaylov).