How to reset historical record flag.

Hi all,

I Used T-code: RE_RHGRENZ4 (New end date) to set a new end date of Q object, accidently I had flaged "Historical record" option. The particular object has flaged as historcal record and I cannont create relation ship (impart of) to any D object (Business event type).

Is there any t-code to run for reset historical flage?

Best regards,

ECTSAKC