Error "This custom field is referenced elsewhere in salesforce.com: AI Application" When Changing or Deleting an Opportunity Custom Field in Salesforce

This article explains how to resolve the error "This custom field is referenced elsewhere in salesforce.com: AI Application" when you change the field type of, or delete, a custom Opportunity field in Salesforce. To resolve the issue, identify which AI Applications reference the custom field, and then temporarily disable the feature to delete the references. In Salesforce, the AI Applications are the following Einstein features.

Step 1: Identify the Einstein Feature That References the Custom Field

Find the Einstein feature that references the custom field to identify the installed AI Application type. The AI Application types are listed in the following table.

Step 2: Modify, Disable, or Delete the Einstein Feature

For example, if the custom field is in use in Einstein Prediction Builder, delete the predictions that reference the custom field by following the steps below.

Delete Einstein Prediction Builder Predictions

1. From Setup, enter Einstein Prediction Builder in the Quick Find box, then select Einstein Prediction Builder. Or, on the Einstein Prediction Builder tile in Setup Home, click Get Started.
2. If it is your first time using Einstein Prediction Builder, click Get Started on the splash page.
3. Delete existing Einstein Predictions.
4. After deleting all existing Einstein Predictions, try changing the Opportunity custom field type again.

Note: Because this procedure includes deletion of customization, use caution when deleting anything in Salesforce.