Walmart’s e-commerce arm is shaking up its private label offerings.

Jet.com will increasingly phase out its assortment of Kirkland Signature branded merchandise — Costco’s private label brand. The move is said to help augment efforts among Walmart’s Sam’s Club chain, which is focused on boosting sales among its own store brand, Member’s Mark, according to Bloomberg.

While the decision for Jet.com to stop carrying merchandise from a Walmart competitor seems logical, it could be a setback for both Jet.com and Costco. Jet.com…