When Paris Jackson posted an Instagram video of herself in March walking along the ledge of a skyscraper, it gave her family flashbacks.

One relative compared it to the infamous 2002 incident in which Paris’ father, Michael, dangled his then-infant son, Blanket, over a fourth-floor balcony of the Hotel Adlon in Berlin.

“But this is worse than that because I still think Michael had control of Blanket and they weren’t nearly as high up as Paris is in this video,” the relative told Page Six. “She’s lost it. She really has.”

In the clip, the wild-child 20-year-old daughter of Michael Jackson can be seen hanging out with her rumored girlfriend, model-actress Cara Delevingne, 25, and some friends at a restaurant. The video shows Paris and Delevingne talking loudly to one another, failing to complete sentences and staggering about.

It then cuts to Paris walking on a ledge as vehicles and pedestrians could barely be seen seemingly dozens of stories below.

She momentarily loses her balance, before slipping back into Delevingne’s arms.

“I almost died!” Paris captioned the video which is no longer on the platform.

“Everyone saw that video, and even though we all knew that she’s now OK, watching it was so traumatic that nobody wants to show it to either Katherine or Joe,” the relative said of Paris’ paternal grandparents.

Jackson insiders reveal a shared fear that Paris is out of control and, per a family source, heading for a “serious meltdown.”

Right now, there are no plans for an intervention, according to the family source. “It’s not happening, but everyone will regret it if she dies out there.”

The worries are compounded by the young woman’s troubled past, which has, by her own accounts, included three suicide attempts and a history that includes self-harming, being cyber bullied and sexually assaulted, and struggling with sobriety and self-esteem issues.

She posted on Instagram on what would have been her father’s 59th birthday last year that he was “the only person who showed me what passion truly was, the one that gave me solid morals to live by and how to dream.”

But insiders say the high of new romance and new friendships has seemingly opened Paris up to more dangerous passions.

“Paris feels free, crazy and uninhibited around her female companions. It just feels right,” said the relative.

Paris Jackson and Cara DelevingneGetty Images for Burberry

It’s believed that the relationship between millionaire millennials Jackson and Delevingne took off during the MTV Movie & TV Awards in May 2017. In December 2017, the relationship appeared to deepen as the pair vacationed across Europe and spent time with Jackson’s godfather, Macaulay Culkin, and his girlfriend, Brenda Song. In March, Jackson posted an Instagram video of her and Delevingne in bed eating strawberries and watching the 2015 movie “Carol,” about a forbidden affair between a shop girl and an older woman.

But it’s what both the relative and the family source describe as Paris’ recent “bizarre” behavior that has the family on high alert.

Last November, she was photographed in France scaling lampposts while chain-smoking and taking selfies in what has been described as a “rundown area.” While in Australia, she was photographed licking a window and making funny faces at the paparazzi at the Melbourne Cup horse races.

Not only is the Jackson family keeping Paris’ social media antics from her grandparents, they’re also keeping her love life under wraps — especially since, the relative said, matriarch Katherine recently suffered a stroke and is recovering at her daughter Rebbie’s home.

“[Paris’ grandma Katherine is] not a champion of same-sex couples,” the relative added. “In fact, she may even be distraught and believe she failed as a guardian.”

Still, Paris and Delevingne have received Culkin’s blessings. “It’s pretty obvious that they are heavily involved in one another’s life,” said the relative.

Paris was photographed a couple of weeks ago looking cozy with Andrei Gillott, 33, a Guns N’ Roses employee, but insiders say she is still with Delevingne. They also note their relief that Paris is away from ex-boyfriend Michael Snoddy, whom she dated from 2016 to 2017 and who had moved in with her at Michael’s home in Encino, Calif.

“[Members of the] family were concerned that he was just using her to make contacts in show business,” the relative said.

Now, they hope that Paris will find true love — but also stay grounded, sober and safe.

“Michael would have wanted her to be happy,” the relative said. “If Cara or whoever it might be makes her happy and complete, at the end of the day, that’s what it’s all about.”