We promote players too early. He should return to Barca B for the rest of the season to recover and get back into the rythm. In the summer he does a preseason with the first team and we see if he's ready for the first team, a loan or another season in B team.
But we promoted him too early so Barca B is not an option and he'll rot on the bench without any playing time until he's ruined and will leave for free in a couple of years to some small club.