The A/L indicator & is not suitable for fixed cash flows

What causes this issue?

Only the asset/liability indicators asset and liability are suitable
for fixed cash flows.

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?

Go to the configuration menu and maintain the correct flow -> cash flow
type allocation.

Error message extract from SAP system. Copyright SAP SE.