Fixed: Shopify bundles can no longer be attached to a subscription plan

Shopify sells bundles one time only, so a shopper cannot subscribe to one. A bundle on a Subi plan caused a cart error for shoppers who chose the subscription on a bundle pack.

Subi now keeps bundles off plans. In the plan product picker, a Shopify bundle's row is disabled with a reason line saying Shopify sells bundles one time only, so it can't join a subscription plan. On the plan page, a bundle already in the plan's product list carries a "Shopify bundle" badge. A product whose variants are mixed is attached as its ordinary variants only; for a box plan, such a product is refused whole.

If a plan already carries bundles, it shows a banner saying how many products on the plan are Shopify bundles, and why the subscribe option does not show on their product pages. The banner offers "Remove bundles from this plan", or "Create a Fixed Bundle plan" if you want to sell the same items together.

The same protection applies when products are added by collection sync or when new products are synced to a plan.