This message will appear when the reference number of a cash bill is repeated. In POS, once a transaction is saved, a checking process on the reference number will be executed. This function is used to avoid repeated reference numbers in the database. If the system finds a duplicate record of the reference number this message alerts the user.
To fix this number, complete the following steps:
Go to Housekeeping, Setup, Transaction Setting.
Select the Format tab.
Change Next No. to the correct running number.
Click Apply.
Click OK.