Quant & twice in transmission table

What causes this issue?

A <DS:GLOS.quant>quant</> is contained several times in
table <ZH>T_LUBQU</> of the quants for which a
<DS:GLOS.posting_change>posting change</> is to be made. This
case is not defined.

How to fix this error?

Check the table you have transferred.

Error message extract from SAP system. Copyright SAP SE.