column {col} has an unrecognised format key "{key}" for its {kind} format; it is ignored.

Warnings reference › format:unknown:*:*

Identifier

format:unknown:*:*

Raised by

The grid (core)

Since

1.63.0

What happened

A key in the format spec is not one the formatter reads, for any kind of column, so it was dropped. Whatever it was meant to control is left at its default - a mis-spelt minimumFractionDigits leaves the decimals unconstrained.

The fix

Check the key against the formatting reference.

Reference

Covered in full at the API reference.