Incorrect financial transaction or item category in item & &

What causes this issue?

As cash budget management is active in this company code, you must
enter a commitment item.

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?

Enter a commitment item or store one in the G/L account master.

Error message extract from SAP system. Copyright SAP SE.