Employee Joining date is showing wrong in sap standard report

Dear All,

In my sap standard report (EE Enterd and left Tcode-S_PH9_46000223) Employee joining date is coming correctly .

When we are running the emplyee hiring process in that by mistaken we punch wrong date after some time we fixed it ,but in my report it showing two record one is with correct joing date and other one is right.

Example

Joining Date

00004175 Sandeep Muzumder 01.02.2011 31.12.9999 50000488 Division of Radiation Oncology

*00004175 Sandeep Muzumder 31.01.2012 31.12.9999 50000488 Division of Radiation Oncology* (This record is incorrect)

same problem am facing for 40 to 50 employee record what i have to do .

Kindly guide me .

Regards

Sandeep