Leading POB &1 cannot be added to compound group

What causes this issue?

The system tried to move a leading POB into a compound group. This is
not supported.
This could happen when a POB was created with linked POBs and later the
BRF+ configuration was changed so that this leading POB is now assigned
to a compound group.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please check BRF+ settings for decision tables DT_PROCESS_COMPOUND and
DT_PROCESS_POB_ADD. It is not possible to add a POB to a compound group
if it was previously created with linked POBs.
To enable the compound group changes on this contract you may delete the
linked POBs in a first step by removing the configuration for linked POB
and compound group in BRF+ for the leading POB and then processing the
Revenue Accounting Items again. Afterwards you can add the compound
group configuration in BRF+ again and trigger a new set of Revenue
Accounting Items by making a change in the operational document.
Note that if you make such changes in BRF+ these will affect all
contracts in case there are any changes from the source system.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.