It sounds as if there is a Reference Cascade Rule that is preventing the deletion (See Configure cascade delete rules).
| Restrict | Deleting a record is restricted unless there are no references to the record. For example, prevent the user record from being deleted if any incident includes a reference to the user. This option has no effect for tables with m2m relationships, meaning that in this example, if the tables have an m2m relationship, the user record is deleted. |
To resolve, you will need to go to your records 5czczb and 4888BY within the Base Configuration Items and remove the reference to the record you are trying to delete. Once that reference to your record has been removed from ALL locations, you should be able to delete.
Hope that helps.
