R.I. Gen. Laws § 44-30.3-10: One abatement claim per dwelling unit.

Only one abatement claim may be filed for any dwelling unit. If a mitigation claim, as defined in § 44-30.3-1(b), has previously been filed for the same dwelling unit, the amount of the abatement claim will be reduced by the amount of the mitigation claim already paid for the dwelling unit, even if the dwelling unit has been transferred to another owner or lessee.