Empty fields error 0CFM_CLASS_MASTER_DATA_ATTR

Dear Gurus,

We are trying to activate the datasource 0CFM_CLASS_MASTER_DATA_ATTR, but run into errors in BW that the "Valid from" and "Valid to" fields are empty. In the security class master data these fields are not present. I made sure all fields in the field selection were visible.

Has any of you an idea where these fields need to filled?

Thank you in advance.

Regards,

Tim