Error in charm 'Select a valid subject' while creating ticket in Direct correction

Hi experts,

while creating a ZDIR(direct correction) ticket from SDCR(change request),when select the direction correction as the subject for ticket.

Its showing an error in ticket

Error details-Select a valid subject.

is there any problem in copy control ?

because while selecting SDHF(urgent correction) as subject its working fine.

Flow of ticket is

SLFN->SDCR->SDHF(urgent correction)

SLFN->SDCR->ZDIR(direct correction)

experts please help me to move forward.