Perform a gift import to update existing records where the gifts are exceptions results in the gifts no longer being present in Raiser's Edge
Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
Alternate Solution - Include the Gift Aid Qualification method gift import field GFGiftAidQualifyMethod in the gift import file with the data value set as 3. This value means Set as Not Qualified which will not impact on Gift Aid as the gift date is outside the Time Limit.