SAP Message BP604 - Item & budget exceeded

Diagnosis
In document item &V1&, budget &V3& for fiscal year &V2& was exceeded byV4.

926322Unjustified error in budget check
1290496Budget message control does not work as expected
1629736Follow-on Note of Note 1290496, unexpected budget error
1068860Extended classic:Budget check errors on trying to change PO
734808MIR4: Error message BP603 when simulating