filter operator "{op}" is unknown for column "{col}"; the condition is refused rather than matching every row. Valid operators here: {list}.

Warnings reference › filter:op:*:*

Identifier

filter:op:*:*

Raised by

The grid (core)

Since

1.56.0

What happened

The operator is not one this column's type allows. The condition is dropped from the filter set rather than passing every row - the fail-closed direction, so a bad condition never widens what the user can see. The message lists the operators the column does accept.

The fix

Use one of the operators listed in the message, or change the column's type if it is the type that is wrong.

Reference

Covered in full at the API reference.