Credit & for key date & not defined

What causes this issue?

A suitable credit was not defined.

System Response

The system cannot calculate the overhead or make the settlement.

How to fix this error?

<ZH>Overhead calculation</>
Define the credit for the validity period <(>&<)>v2
&.
<ZK>Or </>
Enter another credit in the cost sheet.
<ZH>Cost center accrual calculation</>
If you are using <ZK>cross-company code cost accounting</>, define the
credit for all company codes in the controlling area.
If you are also differentiating by <ZK>business area</>, define the
credit for all business areas.
Procedure:
1. Choose <DS:TRAN.KSAZ>Maintain accrual calculation</><ZK>.</>
2. Select the overhead structure.
3. Choose <ZK>structure</>.
4. Select a row displaying a credit
5. Choose Goto -> Credit.
6. Enter the required controlling area.

Error message extract from SAP system. Copyright SAP SE.