Adjustment number reset to 0

Hi,

When attempting to create an adjustment entry, we get the following error:
"Description: Invalid input. Adjustment prefix appended to next adjustment number exceeds specified length of 4 characters."

I noticed that the adjustment number appear to be 0 (the last successful adjustment was numbered 95)

What does that error mean and how can this be fixed?

We use Accpac 5.6


TIA

Alex Abramov