Error during delete Table EKBE while using ME_UPDATE_INVOICE (SM13)

Hi All,

I'd highly appreciated if someone can help me. For "Express document " in MIR4, we have an " error" in cases where the PO's account assignment category which we aren't able to solve. Can anyone help?  When checking the business workplace about the detail of the problem, SYSTEM ERROR: error during delete Table EKBE" is the only detail.

Thanks in advance for the help,

Rgds