Tag Number - Error

[Anonymous]

Hi All, 

I am getting below error while updating my power BI dashboard. This is not allowing me to refresh databases. Would you know what is the issue here. This not allowing to discard or apply the changes. Please help.

Thanks in advance.

[Anonymous]

Thanks Amit. I tried doing that it is not applying nor discarding the changes. 
Would you do know any other method to solve this?

[amitchandak]

@Anonymous , seem like you have done some changes is power query and you have not applied that.

Open power query -> apply and close

you can discard it if not needed . discard -> save. if needed close and open the file