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 3.0.13.33814 2025.06.21 85255 P P 519 332 2025.06.30 09:18:08.102 2025.06.30 09:18:08.621 2025.06.30 08:41:39.510 2025.06.30 08:41:39.842
2 3.0.13.33813 2025.06.14 222a9 P P 533 347 2025.06.21 09:13:18.124 2025.06.21 09:13:18.657 2025.06.21 08:36:05.540 2025.06.21 08:36:05.887
3 3.0.13.33811 2025.05.07 16491 P P 510 315 2025.06.14 09:44:02.828 2025.06.14 09:44:03.338 2025.06.14 09:05:08.736 2025.06.14 09:05:09.051

Elapsed time, ms. Chart for last 3 runs:

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