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What a lingering Stage 1 instance sees if the drop runs before it is retired
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captured: 2026-09-16T19:20:58.517481426Z

Stage 1 create() after V3 dropped "email": org.springframework.jdbc.BadSqlGrammarException
message: PreparedStatementCallback; bad SQL grammar [INSERT INTO customers(name, email) VALUES (?, ?)]
root cause: org.h2.jdbc.JdbcSQLSyntaxErrorException: Column "EMAIL" not found; SQL statement:
INSERT INTO customers(name, email) VALUES (?, ?) [42122-240]