Если кому интересно, запрос вызывался отсюда \Data Dictionary\Maps\CustVendSettlement\Methods\markOffsets:
X++:
while select crossCompany offset order by RecId desc
where ((this.OffsetCompany == offset.TransCompany && this.OffsetRecId == offset.TransRecId) &&
(this.TransCompany == offset.OffsetCompany && this.TransRecId == offset.OffsetRecId)) ||
((this.TransCompany == offset.TransCompany && this.TransRecId == offset.TransRecId) &&
(this.OffsetCompany == offset.OffsetCompany && this.OffsetRecId == offset.OffsetRecId)) &&
/* <SYS>
(offset.CanBeReversed == true || _old)
</SYS> */
// <GEEU>
(offset.CanBeReversed == true || _old) &&
(offset.TransDate == this.TransDate || CompanyInfo::features_W() != CRSEFeatures_W::RU)
// </GEEU>