A mandatory variable in one catalog item depends on a value from another catalog item that was not properly selected or filled in by the user. (high likelihood)
Order guide validation script contains logic that checks cross-item variable relationships and one or more dependency conditions evaluated to false. (high likelihood)
Variable dependencies are configured with incorrect reference variable names or catalog item sys_ids that don't match the actual order guide structure. (medium likelihood)
Client script or UI policy on one of the catalog items is interfering with variable value propagation needed for dependency validation. (medium likelihood)
Order guide contains inactive or inaccessible catalog items that have required variables, causing validation to fail when checking dependencies. (low likelihood)