Cause :
1- Due to power loss, the system closed abruptly and the table got locked.
2- The Same table is accessed by another user from another machine.
Solution is :
Path: eZee Burrp >> Settings(SS:1) >> Transaction lock(SS:2) >>
Select Transaction(SS:3) >> Click on "Unlock" Button(SS:3)
SS:1
SS:2
SS:3