E: volume does not contain lnum

[darekpro]

Good morning, I have a problem unpacking UBI image, image comming from raw NAND dump and I think I have removed all unnecessary information oob etc...

$ python3 ubidump.py -v -s ubifs ubi2.bin
ubidump.py:20: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
import pkg_resources
==> ubi2.bin <==
1 named volumes found, 2 physical volumes, blocksize=0x20000
===== block =====
EC: magic=b'UBI#', v1, ec=1, vidhdr=800, data=1000, imgseq=64688d9 VID: magic=b'UBI!', v1, vt=1, cp=0, compat=5, volid=7fffefff, lnum=[0], dsize=0, usedebs=0, datapad=0, datacrc=0, sqnum=3
VREC: rsvpebs=661, align=1, datapad=0, voltype=1, updmark=0, flags=0, name=b'ubi_boot'
volume 7fffefff : 2 lebs
volume 0 : 44 lebs
== volume b'ubi_boot' ==
unknown magic: ffffffff
[000:0x00000-0x01000] SUPER: kh:0, fmt:0, flags=0, minio=2048, lebsize=0x1f000, lebcount=661, maxleb=661, maxbud=3682304, loglebs=4, lptlebs=2, orphlebs=2, jheads=1, fanout=8, lsave=256, fmt=v4, compr=1, rp=0:0, rpsize=4126720, timegran=1000000000, uuid=b'df716d0d979441498f8b022b0f9dd2e6', rocompat=0
[001:0x03000-0x03200] MST: max_inum=00448, cmtno=235, flags=3, loglnum=[006], root=[072:0x02858], rootlen=188, gc_lnum=[013], ihead=[072:0x03000], ixsize=15112, total(free:77832192, dirty:4465984, used:221112, dead:0, dark:3956736), lpt=[008:0x1a051], nhead=[008:0x1a800], ltab=[008:0x1a000], lsave=[000:0x00000], lscan=[072], empty=611, idx=6, nleb=661
E: volume does not contain lnum

Is there anything I can do to solve this problem?
Greetings