{n} snapshot row(s) produced no key and were dropped from the diff; `keyOf` must be the grid's own `rowKey`.

Warnings reference › diff.unkeyed

Identifier

diff.unkeyed

Raised by

The grid (core)

Since

1.0.1

What happened

Rows in the snapshot produced a null or undefined key, so they could not be indexed and were dropped. The diff therefore reports every one of them as an addition on the current side, or as nothing at all - it is comparing against an incomplete past.

The fix

Use the same key function as the grid's rowKey, so that the snapshot and the live rows agree on identity.

Reference

Covered in full at the API reference.