Alert.log showing corrupt blocks with segment_type=temporary segment

Hi,

In our 10.2.0.4 production database, we are seeing the following messages
in the alert.log

Corrupt Block Found
         TSN = 11, TSNAME = TEST_DATA
         RFN = 69, BLK = 3491, RDBA = 289410467
         OBJN = -1, OBJD = 130479, OBJECT = TEST_DATA, SUBOBJECT =
         SEGMENT OWNER = , SEGMENT TYPE = Temporary Segment

Corrupt Block Found
         TSN = 11, TSNAME = TEST_DATA
         RFN = 68, BLK = 1123, RDBA = 285213795
         OBJN = -1, OBJD = 130446, OBJECT = TEST_DATA, SUBOBJECT =
         SEGMENT OWNER = , SEGMENT TYPE = Temporary Segment

when we query, v$database_block_corruption, we get no results back

Is RFN the file id that we should use dbv against to verify if there is any corruption?

Also. the segment_type is shown as "Temporary Segment". What does it mean? How can we fix it?