AWSDate Not Working in AppSync Mutation

I have a postgres database in Aurora serverless, and one table contains a date field named discovered_date. After connecting this data source in Appsync the mutation is not working as expected. For the mutation the type for discovered_date is AWSDate and I have tried passing date string as mentioned in the documentation, but every time I am getting a validation error.


Start by reproducing the AppSync mutation against the Aurora Serverless PostgreSQL data source, using the AWSDate value described in the documentation and the attached validation-error image. Compare the mutation schema and discovered_date input with the reported validation error; done means the mutation accepts the date and writes it correctly.

Written by the indexing model from the issue text.