==========================================================================
The NOT NULL trap: expand without relaxing the old column's constraint
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captured: 2026-09-16T19:21:04.662650854Z


-- Stage 4 create() against the NAIVE migration (no DROP NOT NULL) --
org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [INSERT INTO customers(name, email_address) VALUES (?, ?)]; NULL not allowed for column "EMAIL"; SQL statement:
INSERT INTO customers(name, email_address) VALUES (?, ?) [23502-240]
root cause: org.h2.jdbc.JdbcSQLIntegrityConstraintViolationException: NULL not allowed for column "EMAIL"; SQL statement:
INSERT INTO customers(name, email_address) VALUES (?, ?) [23502-240]

-- Stage 4 create() against the SHIPPED V2 migration (DROP NOT NULL included) --
Customer[id=1, name=On Time, email=on.time@example.test]