Diskspace error eventhough HDFS is empty

Hi,

hdfs user directory is completely empty.Eventhough when I copy a fie from Local I’m getting the below error.Kindly let me know how to resolve this error.

The DiskSpace quota of /user/***** is exceeded: quota = 4294967296 B = 4 GB but diskspace consumed = 4528348788 B = 4.22 GB