Unable to Replace Standard Lot LOV Record Group with Custom Record Group Using Forms Personalization

We are attempting to customize the Lot (LOV) in the Item Reservation form (INVRSVF1) within the Order Management module using Forms Personalization.
As part of the customization, we have:
Created a custom SQL query to retrieve the required lot records.
Created a custom record group
Configured Forms Personalization to replace the existing record group with the custom record group.
However, when the form is executed, the standard record group continues to be used, and the custom record group is not replacing it as expected. No error messages are displayed during form execution, and the personalization completes without any visible issues.