in board , draft a subtask in progress .the assignger changed .how i can fix it .

[Wang Shuai]

in board , draft a subtask in progress .the assignger changed .how i can fix it .

[Nic Brough -Adaptavist-]

I am afraid there's not enough information in the question. 

I can see you are working on a board, but I don't understand "draft a sub task in progress".  I can guess that "the assigner changed" means a field was changed, but which field, and how?  And what are we trying to fix?