vamshikrishnakyatham opened a new issue, #14110:
URL: https://github.com/apache/hudi/issues/14110
### Bug Description
**What happened:**
Table downgrade from version 9 to 6 fails with `HoodieNotSupportedException:
Non-blocking concurrency control is not supported for table versions < 8`. The
rollback operation during downgrade inherits NBCC settings from metadata
streaming writes but targets a table version < 8, causing validation failure.
**What you expected:**
Table downgrade should complete successfully without NBCC validation errors.
**Steps to reproduce:**
1. Create a Hudi table with Spark using version 0.15.0 (creates table
version 6)
2. Insert some data with some partition paths and create a savepoint.
3. Append some inserts to this table but with version 1.1 (upgrade table
version 9)
4. Rollback to the savepoint
5. Run downgrade command: spark.sql("call downgrade_table(table =>
'table_name', to_version => 'SIX');")
6. Error occurs during rollback phase with NBCC validation failure
### Environment
**Hudi version:**
**Query engine:** (Spark/Flink/Trino etc)
**Relevant configs:**
### Logs and Stack Trace
_No response_
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