EventSubscriber has warning [AA0072] [Business Central]

Hi All,

I have subscribed Event ie. "OnAfterAssignFieldsForNo" on "Purchase Line". see below Image.

It. Show the Warning ie. The name of PurchLine is not valid. The name of variables and parameters must be suffixed with the type or object name. [AA0072].

Please suggest How to solve this warning.

Thanks in Advanced.