1. Create property with table type as field value and source the name of the field value there.
2. In the section, use auto complete control in the field and in the source, either use it as "as defined on property" or "DataPage". And if you are using data page as the source, use the OOTB data page to get the field value results.
3. In the portal, type any single character, dropdown will come. But do not select anything from dropdown.
4. Tab outside the field and see the error the screen as mentioned below.
Error: "The Field Value with key value(s) @baseclass/FieldValueName/s does not exist"
***Edited by Moderator: Pooja Gadige to add capability tag***
Hi @SatarupaP3289: This is expected. If you configure the property display and validation to field value, you should be able to choose only available field value options in UI. If you want to have the liberty that the users can type anything even beyond what is available in field value, you may need to change the implementation to use data page and remove the validation from property.