There is nothing you can do if the locarion is already correct. Basically niantic pick one wayspot per cell as pokestop/gym. And then niantic use other unused wayspot in the same cell as powerspot (its observed that minimum distance of 22m is required)
In fact it really should have been considered a duplicate of the established pokestop as that is also for the football field.
If you have not already done so please learn about the significance of how cells are used in determining pokestop/gyms