The Percy Harvin Debacle was a great lesson for Pete Carroll and John Schneider: They learned just how fragile the psyche of their young Super Bowl team still is.

And they probably learned which other malcontents they are going to need to send packing to make sure their team remains a Super Bowl contender.

This was bound to happen. Carroll and Schneider have flirted with this kind of danger ever since they came to Seattle — bringing in bad apples such as Terrell Owens, Braylon Edwards and Kellen Winslow while courting chuckleheads such as Brandon Marshall and Vincent Jackson.

Adding those kinds of idiots to a young team is always a huge risk — too many impressionable kids on your team. Harvin apparently swung a few of them his way in his 19 months in Seattle.

Harvin has always been known as a bundle of angry energy who stressed out his teams when he wasn’t hurt, and Carroll and Schneider screwed up royally when they spent so much to get him (the failure was far too easy to predict).

Now they are stuck doing damage control with their franchise in the hopes it is not too late to turn it back into the Super Bowl squad it was last season.

The incendiary report by Mike Freeman revealing racism toward Russell Wilson in the Seahawks’ locker room should be very troubling to Carroll and Schneider. One of the things they have to do — now or later — is ferret out the anti-Wilson faction and cut it from the roster.

Seriously: Who wants a racist on their team, let alone an idiot who would rather back an injury-plagued malcontent than the man who led them to their first Super Bowl title?

Maybe Carroll and Schneider think trading Harvin will quiet those young fools. Maybe they think they can recondition them. But hopefully they know which guys are not with the program and need to be retrained or given the boot when convenient for the franchise.

Tellingly, no offensive player other than Marshawn Lynch seemed unhappy that Harvin was sent packing. Doug Baldwin certainly isn’t shedding any tears.

The guys who seemed upset were defenders such as Cliff Avril and the impressionable and often stupid Bruce Irvin — dudes who have no clue what kind of headache Harvin was for the offense. So, it should be easy to get those guys back in line — especially if the Seattle offense builds on what it did last week and starts scoring tons of points.

On Friday, Carroll said his team seems cohesive and focused in the wake of last week’s chaos and the reports of a big locker-room rift, but that doesn’t mean there won’t be changes on the roster.

“I noticed that they’re very, very together and very connected on everything that we’re doing,” he said. “That was an impact that we took last week. I think the guys have come back very determined to show that they’re ready to move ahead and make this a very successful season. Their energy, their attention to detail, the way they’re hanging out and getting along looks great. It looks just like it should.”

Of course, Carroll always sees sunshine — even at night — and if there really is a mutinous Harvin faction, he is going to have to admit it and remove it. He cannot allow losers like that to taint his team and ruin what he is building.

The trade deadline is Tuesday, and it wouldn’t be a huge surprise if any of the bad apples were dealt. That includes Lynch, if he is discovered to be the leader of Harvin’s poison posse. (Remember, there is still a big question over whether Lynch will be back next season anyway. He reportedly still holds a grudge against the Hawks for the contract issue that led to his short holdout during camp.)

Of course, if Carroll and Schneider think the locker room is good enough to get it together and win another Super Bowl, they probably will wait until after the season to reconfigure their roster and get rid of the non-team players.

For those who think Wilson shares some blame in this toxic chemical spill, that’s ridiculous. The complaints about him reportedly are that he is a favorite of the front office, that he doesn’t admit mistakes and that he doesn’t ingratiate himself to black teammates.

Name a franchise quarterback who is not close with the team’s bosses and does not carry great favor in that circle. A franchise QB is probably the No. 2 guy behind the coach in every organization. He is a spokesman for the franchise. He’s going to be close to the coach, GM and owner.

Wilson doesn’t admit mistakes? Check his comments after his poor game against Dallas two weeks ago. And then tell me how often you have seen Peyton Manning, Tom Brady, Drew Brees or Aaron Rodgers admit mistakes. Quarterbacks don’t have to answer to teammates the way other players have to answer to the quarterback. It’s the privilege that comes with being the big man on campus.

And Wilson doesn’t bond with his black teammates? What the hell is he doing in California every offseason then?

The racism and petty complaints all come across as jealousy of a guy who has transcended race and become an NFL and Seattle icon in two short years. You’d think the complainants would be thankful that Wilson led them to a Super Bowl title they most certainly would not have gotten without him.

Seahawks fans have been in love with Wilson ever since he arrived in Seattle. The franchise’s bosses adore him, too, and will be paying him monster money after this season.

He’s not going anywhere for a long time. But anyone who is against him probably will be.