Scenario
User wants to know why the button Change Customer appears only on recently created projects, but then after a while the button no longer appears.
Solution
1. On the Project Record > Relationship > ContactsIf the Contact is made out from an Existing Contact (added via the Contact Drop down), the Change Customer button will be still available since the contact record was not created via the current project making it not a source record of the project.2. But if the Contact added on Relationship was done via the New Contact button, the Change Customer button will now not be available since the contact was created out from the current Project making it a source record out from the project.