Error when trying to edit the Approved time card

Summary

Error-Another person is updating the time card that you're attempting to update. Try again later.

Content

HI All,

Manager was trying to edit the Approved Timecard but it was giving the below error

Error- Another person is updating the time card that you're attempting to update. Try again later.

Could some one please let me know why this is happening.

Thanks in Advance!