Unable to create Table type DFF in Project Contracts

Summary:

Unable to create Table type DFF in Project Contracts (Values need to select from Contract Party contacts)

Content (required):

Hi,

I have a requirement to configure the contract approval to route it to Sales Director, Contract is creating as central, in Contract party contacts level, team mentioned Role Code as Sales Director, and that value has to populate in the Contract Header DFF.

Tried with Table type DFF, able to create Value set with below code, where as creating the DFF it is not able to create, it is thronging an error

mentioning with this is not a valid Identifier: Bind variable is not allowing me to complete, I am getting some kind of issue with this...