FT PS and part time job offer as contractor in a different department

Hi! I’m a full time indeterminate public servant and I’ve been offer a side job as a contractor for a different department. Do you think it would be a problem? There is no conflict of interest as this is 2 different fields (I will still complete a conflict of interest attestation) and no problem for my work schedule. My primary focus will remain my FT PS job, I’m only curious if this is a problem as I’m already a Government employee. Any advises, suggestions? Thanks all.