We've made a couple changes that affect when a relationship can be split. A Relationship has an external identifier that connects it back to the core system. Previously it was possible to split a relationship with only one external identifier, this would leave one relationship with no ties back to the core system. We've made two changes to prevent this from happening.
The first change is the split button will be disabled when there are less than two external identifiers in a relationship.
The button will be enabled when there are multiple external identifiers.
The second change is on the split popup window. You are now required to have at least one external identifier in both of the relationships before you can split the relationship. A red error icon will appear if one of the external identifiers list is empty and the save button will be disabled. When you split a relationship you will now be required to move at least one external identifier to the new relationship and keep one in the old relationship.