Delete Override

Put the transaction back to its automatic state.

Two different things are called an "override" by the clients, and this route undoes both (17 Oct 2026: the web's "reset category to automatic" called it and got 404 twice):

• the TransactionOverride row (notes, excluded_from_budgets, is_reimbursable, reimbursed, splits) — deleted if present;
• the category the user (or their adviser) set on the row (category_changed_by), which the category endpoint writes to the transaction itself and, for scope "merchant", to a MerchantCategoryOverride rule. The rule for this merchant is deleted, the row is re-classified by the automatic path (the v2 category order for a CLASSIFY_V2 user, the rules classifier otherwise) and category_changed_by is cleared.

404 only when the transaction is not this user's. Nothing to undo is a 200 with both flags false, so a double tap is harmless.