Suck it and see. You may find the power Cleans can replace the shoulder workout altogether being as they are a compound movement and you would see no discernable, (if any), loss of deltoid condition.
However they may be a possible trigger for overtraining the Deltoids, so again, if you subbed them for an exercise with a less all round impact, that would still target the primary area desired, you might fond your Shoulder workout would be enough to maintain and enve promoted deltoid condition.
It could be the effect on the Deltoids from Powercleans, boosts, instead of partly counteracting, the Shoulder workout and is therefore a beneficial bedfellow with Shoulder workouts.
Another option is to do a back and Shoulder workout where the Cleans might benefit the Shoulders but not have a potentially negative impact on the Detoids as might be the case when done seperately.
As I said before though it's suck it and see. You need to make one change and one only to your circumstances if you felt it might be wise to make a change and see how that worked for about 2 -3 weeks, then if it felt like it wasn't working undo the hange and try another, so every time you made a change you "isolated" it so what it did or did'nt do could be really understood in a way that making another 1 or more changes wouldn't permit.
I can't tell you for sure if you're helping hindering or making no difference to yourself on this aspect of your training, as I am not you and don't know how your body responds to what you do to it.
Hopefully I've made sense and given you food for thought if it's needed