Now that you have all of your custom Report Types using the deprecated EventApi__Event__c field open to the Screen Flows page in browser tabs, it’s time to update your custom Report Types with the new EventApi__Attendee_Event__c field.
Update Custom Report Type With New Lookup Field:
In the Fields Lookup box on the right-hand side, locate the EventApi__Attendee_Event__c field. It may show as Event.
Make sure Attendees Fields is selected as the View.
Drag and drop the EventApi__Attendee_Event__c field to the section under Field Layout Properties to add it to the Report Type.
Do not remove the EventApi__Event__c field at this time. Removing this field prematurely may risk losing reference to how you used the field in the report.
Click Save to save your changes. This field will now be available on any custom Reports using this Report Type.
Repeat these steps for any other custom Report Types you located. Be sure not to close any of your tabs, as we will return to these Report Types later.
When the EventApi__Attendee_Event__c lookup field has been added to all of your custom Report Types, Reports using these Report Types can be updated to replace the EventApi__Event__c field with the EventApi_Attendee_Event__c field. Learn how in Step 3: Update Custom Reports.