Error 90008 — Color/size combination invalid for variation

A child variation has a color+size pairing that isn't allowed by Amazon's variation theme — typically because either the color or size value isn't in the parent's defined set.

Variation themes enforce that all child combinations use values pre-declared on the parent. Submitting a child with an undeclared color or size triggers 90008.

1. Confirm the parent's variation_theme = SizeColor (or your chosen theme).
2. Make sure every child's color value matches one declared on the parent.
3. Same for size — exact match, case-sensitive.
4. Resubmit children.

• Adding a new color mid-season without updating the parent first
• Mixed case ('Black' vs 'black') treated as different