What is causing this error in Account field in custom object

Summary:

We have a custom object called Contracts_c and we migrated this object to redwood UI via CX extension generator but unfortunately most of the properties are not migrated. One example is the Account field (AccountLookup_Id_c) which is a DCL field. Our alternative is to a template and connect to the account object. It is working fine on the initial implementation but we recently encounter this error: Error: Cannot assign a primitive value to a target with 'object' type.

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