Catelynn Lowell 'Furious' With Farrah Abraham For Punching Producer, Goes Off On Camera

The feud has reignited!

As RadarOnline.com exclusively reported, Farrah Abraham shocked the Teen Mom OG cast and crew when she hit an executive producer while filming a heated argument at her home a few months back.

But no one is as angry with the volatile sex tape star, 24, as her on-again, off-again nemesis, Catelynn Lowell, insiders told Radar.

According to the source, costars Lowell, Maci Bookout and Amber Portwood watched the entire clip of Abraham attacking exec Larry Musnik at an after show taping in New York over the weekend. (Abraham was conveniently absent from the set.)

Lowell, 24, known to fans as MTV's sweetheart, "completely lost it," the insider recalled to Radar.

"Catelynn was furious about Farrah's behavior, and called her every name in the book with cameras rolling," the source said. "Getting violent with a crew member who they've all known for years is completely out of line, and Catelynn said she wouldn't stand for it."

Lowell, who married longtime love Tyler Baltierra, 23, in August, went on to reveal Abraham's notorious diva behavior behind-the-scenes.

"She said Farrah doesn't even allow the crew to use her bathroom," the insider claimed. "Instead, she makes the crew bring porta potties to her property!"

Abraham and Lowell have a long history of animosity.

In early 2014, Abraham criticized Lowell's "bad choices," including her decision to have baby Novalee, now 11 months, after she placed daughter Carly for adoption in 2009.

"Huh bad choices?!? Hahaha I didn't make a so-called 'sex tape' but WE make the bad choices?" Lowell scoffed on Twitter.

After public slams back and forth, the costars eventually hugged it out on a Couples Therapy reunion show in August of last year.

But the peace clearly didn't last. Expect the feud to grow nastier in coming months, the show insider insisted.

Are you Team Farrah or Team Catelynn? Sound off in the comments.