The administrator at Ursa Major Solar has been asked to change the work Item and...

One scenario that could prevent an administrator from changing the relationship between work item and project custom objects from master-detail to lookup is that roll-up summary fields exist on the master object (project). Roll-up summary fields are fields that calculate values from related records in a master-detail relationship; they cannot be used in a lookup relationship. If roll-up summary fields exist on the project object, they would prevent the administrator from changing the relationship type unless they are deleted first. A junction object is not required to support a lookup relationship; it is only used when creating many-to-many relationships between two objects using two master-detail relationships. The lookup field in all the records containing a value or the lookup field being required for saving records are not scenarios that would prevent changing the relationship type; they are scenarios that would allow changing the relationship type without losing data or functionality. References: https://help.salesforce.com/s/articleView?id=sf.fields_about_roll_up_summary_fields.htm &type=5 https://help.salesforce.com/s/articleView?id=sf.relationships_considerations.htm &type=5