Budget not checked in collective release of service entry sheets.

Hi,

A service purchase order created on FY2013 with real fund center and commitment item, budget was consumed but open commitment item does not carry forward to FY 2014.Now user created service entry sheet and collective release it with t.code ML85. where budget was zero for FY2014 but system does not check budget make negative entry. How it is possible ??

Regards,

Rabin.