Root cause (issue #1709 residual corner): on an in-place reconnect, the
callback carries each account's external_id dedup scope by matching prior
accounts by IBAN or uid. A no-IBAN account whose ASPSP minted a new uid
matched neither, so it got a fresh scope: every historical external_id
regenerated, Layer-1 dedup missed the re-import, and the whole history
came back as new unbooked rows. The cash_accounts mirror then could not
find the old row either and allocated an overflow 19xx slot plus a NEW
row, which also blocked the content-dedup bridge's account guard.
Fix: pair such accounts by elimination, only when unambiguous (per
currency, exactly one unclaimed prior and exactly one fresh-scope new
account, neither with an IBAN): carry the prior scope and enabled flag,
and reuse the connection's own old cash_accounts row via the existing
explicit reuse_cash_account_id promote path in upsertFromPsd2, so the
row id, ledger, and transaction links survive the uid change. Any
ambiguity keeps the previous fresh-scope behavior. Also count
account-incompatible same-feed orphaned ids in the scope-drift shadow
(log-only) so fleet validation can see this incident class.
IBAN-carrying accounts were already fixed by #1705/#1728; the frozen
external_id format is untouched.
Claude-Session: https://claude.ai/code/session_01SyDuePXxUFowaPBKpAv8SF
Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Jakob Wennberg
21c63b8b12