Out-of-Date Custom Template Error

[veenuisthebest]

do not worry !! it ain't any serious error.

But you can remove that message by just reverting the template. that should solve your problem !!

But this way, you'll lose all the editing that you made in the header template .. if that's not important, revert it.. If that's important, do not revert it.. it should not create any problems..

Stilll... to be more carefulll.. I'll suggest you creating a child style and try reverting the header template in it. See the effect. If satisfied, then you can revert in the main style.