Updating Individual records if they are a part of array in another table

My Line Operations table has a column that contains the array of Manpower associated with that line. I want to update the individual record of that manpowers attendance to have status occupied if he is a part of the Manpower array.

Let me know if you DO NOT understand the brief. I will add screenshots as a follow up.

Some screen shots would be useful to provide additional context, yes.