ASKB Message no. F5704 Inconsistent amounts

Dear all,

When running transaction code ASKB Message no. F5704 Inconsistent amounts appears:

Diagnosis
     Item "0000000002" in the FI/CO document has the debit/credit indicator
     "S". Amounts in the FI/CO interface are assigned a +/- sign as follows:
     o   Debit amounts are greater than or equal to zero
     o   Credit amounts are less than or equal to zero
     Not all the amounts in item "0000000002" meet this specification.

The posting that the system is trying to do is:

PK GL Account Amount currency

40 5400610050 121.115 CLP

40 6400610010 121.115- CLP

The posting proposed by the system is weird with two debit postink key by a credit amount in one of them.

Thanks in advance