It would be helpful to know in reference to what part of the contract you are talking about.
That being said, it sounds like there is an issue with the property, and to compensate you, the seller is going to give you either a credit of money at closing, or lower the sale price of the property.
I'd make sure that I knew from the seller exactly how much the amount was in either case, and exactly what it applied to.
I agree with @James C. I would also probably take the repair credit over the price reduction so as to save cash out of pocket.
Make sure the lender is okay that the seller credit goes to reserves or repair escrow. Sometimes they try to use it to reduce funded loan proceeds to drop their LTV lower but that does nothing for the buyer.
@Alex Olmo Echo'g the comments above me, make sure the seller credit goes to reserves or repairs escrow. Personally, I would take the repair credit over the price reduction.
Nonetheless, if you provide more context, I'm positive other can help you with deeper insight.