What's the meaning of this error?

[罗勇刚(Yonggang Luo)]

bzr: ERROR: An inconsistent delta was supplied: [(None,
StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fb',
'a'), '20 at c19a81e0-789f-1047-ad32-a6eb6
70b4137:llvm%2Fbranches%2Fhistory%2Fb%2Fa'), (None,
StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa',
'TODO.txt'), '20 at c19a81e0-789f-1047-ad32-a6
eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2FTODO.txt'), (None,
StaticTuple('13 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2F',
'a'), '20 at c19a81e0-789f-1047-ad32-
a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa'), (None,
StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2Fa',
'a.txt'), '20 at c19a81e0-789f-1047-ad32-
a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2Fa%2Fa.txt'), (None,
StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa',
'HA.txt'), '20 at c19a81e0-789f-1
047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2FHA.txt'), (None,
StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa',
'b'), '20 at c19a81e0-789f-
1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2Fb'), (None,
StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2Fb',
'b.txt'), '20 at c19a81e0-7
89f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2Fb%2Fb.txt'),
(None, StaticTuple('13 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2F',
'readme.txt'), '2
0 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Freadme.txt'),
(None, StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fb%2Fb',
'b.
txt'), '20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fb%2Fb%2Fb.txt'),
(None, StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137
:llvm%2Fbranches%2Fhistory%2
Fb', 'TODO.txt'),
'20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fb%2FTODO.txt'),
(None, StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137
:llvm%2Fbranches%2
Fhistory%2Fa', 'a'),
'20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fa%2Fa'),
(None, StaticTuple('13 at c19a81e0-789f-1047-ad32-a6eb670b4137
:llvm%2Fbranches%2Fhis
tory%2F', 'b'),
'20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fb'),
(None, StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137
:llvm%2Fbranches%2Fhistory%2Fb'
, 'b'), '20 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2Fb%2Fb'),
(None, StaticTuple('20 at c19a81e0-789f-1047-ad32-a6eb670b4137
:llvm%2Fbranches%2Fhistory%2Fb%2Fa'
, 'a.txt'), '20 at c19a81e0-789f-1047-ad32-a6eb670b4137
:llvm%2Fbranches%2Fhistory%2Fb%2Fa%2Fa.txt')]
reason: New items are already in the map
[(StaticTuple('13 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2F',
'a'), '14 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2
Fbranches%2Fhistory%2Fa'),
(StaticTuple('13 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhistory%2F',
'b'), '15 at c19a81e0-789f-1047-ad32-a6eb670b4137:llvm%2Fbranches%2Fhis
tory%2Fb')].


-- 
         此致
礼
罗勇刚
Yours
    sincerely,
Yonggang Luo
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