functional.sqlancer.tidb_15844_test. NATURAL RIGHT JOIN results in an unexpected "Unknown column" error

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Full history of outcomes and elapsed time, ms:
NN SNAP_INFO CS_outcome SS_outcome CS_run_time SS_run_time CS_run_beg CS_run_end SS_run_beg SS_run_end
1 3.0.13.33809 2025.05.14 6638e P P 572 329 2025.06.28 14:55:38.367 2025.06.28 14:55:38.939 2025.06.28 14:15:32.960 2025.06.28 14:15:33.289

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