flag over

[Jignesh77]

I am reading an Inhaler formulary (NHS).
Ordering: flag over ordering to nurse/ pharmacist/ healthcare assistants
https://hgs.uhb.nhs.uk/wp-content/uploads/Prescribing-and-Administering-Medicines-Procedure.pdf
What is the grammatical form and function of "over" in "flag over..."?
What is the difference between "flag" and "flag over" in the given context?

 

[Glasguensis]

This looks as if it should be flag (=notify) over-ordering (=ordering too much).