error appear on date column

[PowerBIBeginer]

Hi All, Can you see red error appeared on Complete Date column. Can anyone guide me what is the exact reason of the same.. 

[PowerBIBeginer]

Hi Community helpers, I', still finding solution for this. Question is, (pls refer screenshot attached) why "complete date" column showing dotted line. This dotted lines means some part of error. It is exactly showing after removed duplicates step.. Pls guide, Im seriuosly looking for solution on this

[PowerBIBeginer]

Can anyone please guide here..

[Jelena_L]

Hi @PowerBIBeginer . 

Where exactly the error? 

Best regards, Jelena