# X_CURSOR_VALUE_UNSUPPORTED

## Means

a sort value cannot be carried in a cursor

## Typical cause

a read ordered by a column whose values are objects, or by a number that is `NaN`/`±Infinity` — a cursor is JSON, and `Date` and `bigint` are the only non-JSON types it tags and revives. Raised where the cursor is MINTED, not where one arrives: the mistake is the read's own `orderBy`, so no retry and no fresh first page repairs it

## Fix

order by a scalar column — `.orderBy('createdAt')` or `.orderBy('id')` — and project the composite value into the row instead

[Policy and authz](/error-codes#policy-and-authz)