Dear Zorawar
You are right. Cost center master data doesn't have the group or hierarchy field. You have to use a different way to create a cost center.
You have to create a blank CR first - make sure CC hierarchy / group and Cost center entity types are part of this CR and do not tick single process the other option in CR type.
Follow the below instructions -
1. In your Change request menu you can see the collective processing option. Click on that
2. Then for cost center select the cost center group as entity type. Choose the valid edition and select the controlling area and click on next.
3. Click on it and you will get a blank screen with various buttons on top
4. Click on the edit option. Initially your screen is blank with no data.
5. Now create a topmost hierarchy - Click on insert button and choose create new hierarchy option.
6. Do not select the Insert as subnode option as it’s a top node. Click on Transfer, the hierarchy is created. Save it in your CR.
7. Once the hierarchy top node is created, you have to assign groups under it. Create group in same way i.e click on Insert option and click on Create new CCtr Group. Add as many as groups you want. Select insert as subnode as it will be part of hierarchy.
Once you create group, you have to now create Cost center. To create cost center, you have to select on NEW button which is on top of the screen. Once the CC is created, you have to assign it under the group.
To do that again click on Insert - Insert cost center under the relevant group. Take your CC which you have created now and assign it under group.
This way you create a CC and assign it under the group. If your replication model is perfect then the CC will be replicated first and after few minutes (min 20 mins for big hierarchy) the CC will get assigned to the group in ECC.
Hope this is useful to you.
Kiran