Manually-entered quantity in & is outside the error range tolerance (low)

&CAUSE& test
You entered a quantity that is smaller than the value calculated by the
system. The tolerance percentage defined for errors in the conversion
group has been exceeded.

How to fix this error?

Do one of the following:
Change the manually-entered quantity so that it is within the accepted
ranges.
In the conversion group, increase the percentages for the tolerance
check (Transaction O588).
,,<ZH>Note</>: If you do not have the authorization to do this, contact
your system administrator.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Sample ranges: Examples:
High error range 10% 1100.00 and above
No message sent 1000.01 - 1049.99
System-calculated value 1000.00
No message sent 999.99 - 950.01
Low warning range 5% 950.00 - 900.01
Low error range 10% 900.00 and less
Quantities below zero are not allowed.

Error message extract from SAP system. Copyright SAP SE.