Error while maintaining determination rule in CRM

Question

Hi,
I get the following error while trying to copy the existing determination rule. Could you analyse this please.
ERROR MSG:
Prefix number: entry missing for system CRD client XXX
Message no. 5W023
Diagnosis
Tasks, rules, and workflow definitions require an ID that is unique throughout all systems and clients. In this way, you can ensure that you can transport these objects from one system into another at any time (without restrictions). From a technical point of view, the uniqueness of the ID is ensured by what is known as a "prefix number". You can define a separate prefix number for every system and every client in table T78NR.
System Response
If a prefix number is not defined in the client in which you are currently working, it is not possible to maintain (maintenance terminates).
Procedure
Maintain table T78NR in Customizing, and create an entry for the system in question and the current client.
Many thanks
Guest01

Answer 1

Organizational Management objects are identified by an eight-digit number.
In the cases of tasks, workflows, rules and task groups, this eight-digit number consists of a three-digit prefix number followed by a five-digit number which is determined by internal number assignment. The complete number must be unique across systems and clients. From a technical point of view, the uniqueness of the number is catered for by the prefix number.
Cheers
-Srinivas Kumar