if resourceClaim.Status.Allocation == nil {
			allErrs = append(allErrs, field.Forbidden(fldPath.Child("reservedFor"), "may not be specified when `allocated` is not set"))
		} else {
			if !resourceClaim.Status.Allocation.Shareable && len(resourceClaim.Status.ReservedFor) > 1 {
				allErrs = append(allErrs, field.Forbidden(fldPath.Child("reservedFor"), "may not be reserved more than once"))
			}