Record column sort not working

Hi,

I'm trying to add this grid column sort where my data is being pulled from a record, 

a!gridColumn(
label: "Modified",
width: "2X",
sortField: 'recordType!Record.fields.updatedDt',
value: fv!row['recordType!Record.fields.updatedDt']
),

Now when i try to manually sort on the column getting the error:

Interface Definition: Expression evaluation error [evaluation ID = 779f6:4b583] : An error occurred while executing a save: Expression evaluation error at function fn!error [line 114]: Invalid field identifier: "#"urn:appian:record-field:v1:adaa93fd-a839-446b-9a78-c0ea56a7b0d9/a20944d4-cb3d-4847-877e-ce0bf6144e3b"".