Duplicate A/P Check Numbers in separate check runs

Hi EveryOneWe have been experiencing duplicate check numbers between seperate check runs, the check is already sent to the bank. if some one needs to print the check by overriding in the program P04572 "NXTC", the check number will duplicate and no warning or no error message sent to the user. This issue happened twice and three times a year.
Is there any fix to avoid that kind of error.
Is any help concerning this issue.
Regards
Mohamed
IT JDE Analyst
 EnterpriseOne 9.0 Tools Release : 8.98.4.2
 Enterprise Server = W2008x64 R2 + Visual C++ .NET 2005 SP1  
 Deployment Server = W2008x64 R2 + Visual C++ .NET 2005 SP1