Specification of posting date only possible if diff.posting included

What causes this issue?

You have entered a posting date although the indicator
<LS>Difference posting</> is not set. No posting date is required for
counts without difference posting.

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?

Either set the <LS>Difference posting</> indicator or remove the
posting date.

Error message extract from SAP system. Copyright SAP SE.