how to fix SDV error sequential data context columns ignored synthetic accounts break fails

TL;DR

Fix this in SDV by acting on the exact message first: declare the context columns in the sequential metadata, fit with the sequential synthesizer rather than a single table one, confirm the context values are carried into sampling instead of being resampled, and verify that every generated sequence for an account keeps the same context values across all its rows. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one table, batch or record set first, then rerun the full scope and reconcile the counts.

sequential data context columns ignored - synthetic accounts break

Use this when

• The operation in SDV fails with this exact message or symptom: sequential data context columns ignored - synthetic accounts break.
• The same failure repeats on retry with unchanged inputs.
• Generation, validation or export is blocked until this item completes.

Not for this skill when

• The message is an outage notice from the platform. Resolve that first, then return here if this error remains.
• The operation completes and you only disagree with its output quality. That is a quality review, not this failure.

Steps

1. Reproduce the failure with the smallest scope that still shows it in SDV, and copy the full message plus the table, column or job involved into the run notes. Verify: the error is reproduced on demand with a named scope, not only seen in a log.
2. Apply the specific fix for this error: declare the context columns in the sequential metadata, fit with the sequential synthesizer rather than a single table one, confirm the context values are carried into sampling instead of being resampled, and verify that every generated sequence for an account keeps the same context values across all its rows. Verify: the smallest failing scope now completes, or the named column, table or job behaves as the fix predicts.
3. Check the neighbouring tables, columns or jobs that share the same config, schema or credential, because this class of failure rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Rerun the original operation in SDV on the previously failing scope, watching for the same message rather than assuming success from a quiet log. Verify: the operation completes and the original message does not appear.
5. Compare the result counts, distributions or status against the source in SDV so a silent partial success is caught before sign off. Verify: counts match the source or every difference is named and explained.
6. Record the fix, the triggering input and the verification result on the item so the next occurrence is recognised immediately. Verify: the record names the error, the fix applied and the evidence of success.

Why it happens

Sequential synthesis treats non sequence columns as context only when they are declared as context in the metadata, and undeclared columns get modelled per row, which breaks the constant per account values the downstream logic expects.

Variant phrasings

sequential data context columns ignored - synthetic accounts break

The verbatim form searchers paste from the terminal or console. Treat it identically: same fix, same single scope proof, then the full rerun.

How to fix - how to fix SDV error sequential data context columns ignored synthetic accounts break fails

The how-to phrasing for the same failure in SDV. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

SDV troubleshooting for this failure

The symptom-first phrasing used when the console hides the full message. Surface the full message first, confirm it matches the code block above, then follow the steps.

Compatibility: SDV at current versions, plus the platform API or console the query names; no extra tooling beyond the source system access needed to verify counts.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_KZSm6JTmdbnSNfR5EGMFzg