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The grid (core) ยท console.warn

rolling back a rejected write threw; the cell may still show the rejected value.

Printed by The grid (core), prefixed [lattice], since 1.4.0.

Warnings referencepending.revert.throw

Identifier
pending.revert.throw
Raised by
The grid (core)
Since
1.4.0

What happened

A write was rejected and the rollback itself threw, so the cell may still be showing the value the server refused. The grid's own bookkeeping is unwound either way, so the cell is no longer marked pending - which makes a wrong value look confirmed.

The fix

The error is attached to the console line. Refresh the affected rows if the rollback path can fail in your setup.

Reference

Covered in full at the API reference.