To reproduce:
1. John submits ticket
2. Account Jack is created
3. John is merged into Jack (John is deleted, Jack remains)
4. John's ticket is now marooned, assigned to "John" and inaccessible by Jack
1. John submits ticket
2. Account Jack is created
3. John is merged into Jack (John is deleted, Jack remains)
4. John's ticket is now marooned, assigned to "John" and inaccessible by Jack