Returned values using PermID is different from using orgID

Hi all,

I wanted to retrieve the employees of the company Claire's INC, when I type employees in the Data Item Browser it advises me to use the field 'TR.PCFullTimeEmployees'. But for my surprise if I use python to get the data and using the orgid as instrument I do not get anything. On the other hand, if I use permid I get the data.

Why is this happening? Is there any way to get the permid knowing the orgid?

Thanks in advance!!!