Reversal of partial amount: ratio amount/quantity too large

What causes this issue?

When a reverse entry is made for a partial amount, the ratio
<ZG>Reversal value: reversal quantity</> cannot be greater than the
ratio <LS>Value invoiced to date: quantity invoiced to date</>.

How to fix this error?

Correct the entries in the fields <LS>Amount</> and <LS>Quantity</>.
INCLUDE STORNO

Error message extract from SAP system. Copyright SAP SE.