Warning about Deprecated function

Warning C4996 : 'UEditorEngine::PlayInEditor': Override StartPlayInEditorSession(FRequestPlaySessionParams& InRequestParams) instead. InWorld is GetEditorWorldContext().World(), and the other arguments come from InRequestParams now. Please update your code to the new API before upgrading to the next release, otherwise your project will no longer compile.

How can I fix this warning

You can ignore this at the moment as it is just a warning.
The fix for this should be available in the next release (2.00.14 & 2.01.06).