How To Fix TU086 - In 'Allowable date' please enter each budget billing cycle once only

SAP Error Message - Details

• Message type: E = Error

• Message class: TU - Billing/Scheduling/Budget Billing

• Message number: 086

• Message text: In 'Allowable date' please enter each budget billing cycle once only

What causes this issue?

When you entered the combination of budget billing cycle and number of
budget billing plan items, the system established that two cycles are
exactly the same.

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?

INCLUDE ISU_KORR OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.