Hi Mayank,
Please execute below SQL to identify the object having problem. Based on object identification next steps can be planned.
select segment_name, partition_name, segment_type, block_id, blocks
from dba_extents
where (161792 between block_id and (block_id + blocks - 1))
and file_id = 255 and rownum < 2;
Hope this helps
Regards,
Deepak Kori