QCI : Conversion group - reading group relation not maintained for &

What causes this issue?

The system requires a relation of the conversion group to the reading
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?

Maintain the relation of the conversion group to the reading group:
<DS:TRAN.O588>Link conversion group to reading group</>.
Display/change reading groups: <DS:TRAN.O587>Create/change reading
group</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.