Coventry City boss Andy Thorn has warned Gael Bigirimana about his move to Newcastle United.
The England youth international made the switch yesterday.
Thorn said: "Gael's a good talent, but he's still got a heck of a lot to learn and I would be really disappointed if he left.
"I was a young lad when I went to Newcastle. They are a massive club and if you aren't careful it eats you up if you go too soon, so you have to be very careful."