VIDEO: Kim and Kourtney Kardashian Fight Over Daughters' Birthday Party in New 'KUWTK' Clip

Candy Land just turned into a whole new kind of battle.

E! News just released a first look at Keeping Up With the Kardashians' 17th season, set to premiere this fall. In the clip, sisters Kim and Kourtney get into a heated debate over serving candy at their daughters’ joint birthday party.

The theme of the party? Candy Land.

Kim and Kourtney start with playful banter before diving into the serious business of planning North West and Penelope Disick’s bash.

"Call the police," Kim jokes while eyeing a glass jar of sugary treats resting inconspicuously on Kourtney's coffee table. "There's candy in here!"

Kourtney defends herself, saying, “It’s my only hidden stash of candy,” after explaining it came from their mother, Kris Jenner. “So you guys fill yourself up on the biggest number one cause of aging,” she sasses to Kim and Khloé as they roll their eyes.

The Poosh founder fancies herself an expert on all things health-related and is committed to practicing it in her lifestyle, even including at her daughter’s birthday party.

She tells Kim she wants to talk about North and P’s party, and begins to say, "There's no reason that you can't have the theme of the party and have treats that are…” Kim quickly interrupts her, knowing where the conversation is going.

“It's a Candy Land-themed party! That's, like, what the party is about," Kim snaps. "It's not f**king Gluten Free Land over here.”

The argument escalates quickly, ending with them deciding to have separate parties.

"Perfect. That's exactly what we'll do,” Kim states, getting in the last word of the clip.

See the full fight (and Khloé’s hilarious background reactions) when Keeping Up With the Kardashians returns this fall.