Diagnosis
You have already saved an (invidual) reversal date for the current rentadjustment record in the detail screen.

System Response
Consequently this record has already been reversed, and it is notpossible to reset the selection.

Procedure
Enter a (general) reversal date in the initial screen. In this case,the system will not carry out the reversal directly but only when youhave selected the record and chosen the "Reverse" function.