Hi Yury,
Check in transaction FS00 the sort key used in vendor reconciliation account. It may have value "000" (Allocation number).
Then check in transaction OB16 the lengh defined for field ZUONR in that sort key "000". By default may be set in 10. Change it to 18 (lenght for ZUONR and HZUON) and your problem should be solved for next documents.
Best regards!