DataSource 0PM_SCH_PLND_ORDER; switch to package EAM_EHP4_SR_SF

Hi Experts,

I'm trying to activate a datasource 0PM_SCH_PLND_ORDER Scheduling Overview and Planned Order in ECC, but got this error:

DataSource 0PM_SCH_PLND_ORDER; switch to package EAM_EHP4_SR_SFWS_SC is off

Please help. Thanks!

Ting