Custom Triggers, Buttons, Links, Actions, and Fields are located on the Attendee object via the Object Manager. The directions below will guide you through updating these areas:
If accessing a Trigger from the Field References table, skip to step 4.
Navigate to Setup > Object Manager > Attendee.
Select Triggers from the left-hand menu. If you have any Triggers for the Attendee object, they will display here. Note that the AttendeeTrigger is shipped as a part of the product.
Check each custom Trigger and determine if you have used EventApi__Event__c in the Apex Trigger tab.
If the Trigger is part of a Managed Packaged, you will not be able to access the body of the Apex Trigger.
Select Edit with the Apex Trigger tab selected and replace all instances of EventApi__Event__c with EventApi__Attendee_Event__c.
Click Save. Repeat this process for any other Triggers using the EventApi__Event__c field.
Custom Buttons, Links, Or Actions
If accessing a Button, Link, or Action from the Field References table, skip to step 4.
Select Buttons, Links, and Actions from the left-hand menu on the Attendee object.
You will only be able to review custom Buttons, Links, and Actions. They will appear blue. Select each label listed in blue to open.
Locate the Button or Link URL field and determine if the EventApi__Event__c field is in use here.
If the EventApi__Event__c field is in use in the Button or Link URL field, click Edit.
Replace the EventApi__Event__c field with the EventApi__Attendee_Event__c field.
Click Save. Repeat this process for any other Buttons, Links, and Actions using the EventApi__Event__c field.
If accessing a Formula Field from the Field References table, skip to step 5.
Select Fields and Relationships from the left-hand menu on the Attendee object.
Select the Data Type column header to sort all fields by Data Type.
Locate any Formula fields, which should now all be grouped together.
Select each Formula type field to view details and locate the Formula Options section.
Check if EventApi__Event__c is used. If it is, click Edit.
Replace EventApi__Event__c with EventApi__Attendee_Event__c in the Formula Options section.
Click Save. Repeat this process for any other Formula type fields using the EventApi__Event__c field.
You have updated the deprecated EventApi__Event__c field in customizations located on the Attendee object. Next, you will locate the rest of your customizations located in Setup. Navigate here to begin.