Brightway2导入ecoinvent 3.10出现未关联交换问题求助

我使用最新版bw2io 0.8.12在Brightway2中导入ecoinvent 3.10 cutoff数据库时，出现以下输出：

4034 unlinked exchanges
62 unique unlinked exchanges

我已更新conda和Brightway2，安装了bw2io 0.8.12（根据Chris Mutel的帖子，该版本应支持ecoinvent 3.10的成功导入），随后删除了biosphere3数据库，创建新Brightway2项目并尝试导入数据库。目前我可通过删除未关联交换完成导入（代码片段如下），小型LCA项目暂时可用，但希望有人指出是否遗漏步骤以实现无未关联交换的导入，或确认是否需Brightway团队修复该问题。

if 'ecoinvent 3.10 cutoff' in bw.databases:
    print("Database has already been imported")
else:
    ei310 = bw.SingleOutputEcospold2Importer(fpei310, 'ecoinvent 3.10 cutoff')
    ei310.apply_strategies()
    ei310.statistics()
    ei310.drop_unlinked(i_am_reckless=True)
    ei310.write_database()

以下为62种唯一未关联交换的列表，所有交换的Type='biosphere'、Unit='kilogram'，Reference Product、Categories、Location均为'unknown'：

Name                        Amount
1,3-Dichloropropene         3.79816E-14
2,4-D                       5.1299E-16
2,4-D dimethylamine salt    6.43555E-20
2-Chlorophenol              4.56463E-12
2-Methyl-2-butanol          7.96412E-17
Acenaphthylene              1.32035E-08
Acetic anhydride            5.89156E-09
Alpha-cypermethrin          2.26632E-18
Anthracene                  0.000894036
Benz(a)anthracene           5.13917E-09
Benzo(b)fluoranthene        4.91703E-09
Benzo(ghi)perylene          5.40864E-09
Benzo(k)fluoranthene        5.79605E-10
Chlorpyrifos                1.51881E-17
Chrysene                    3.60576E-09
Clethodim                   1.54785E-17
Clodinafop-propargyl        2.94307E-22
Clopyralid                  1.14674E-17
Cloquintocet-mexyl          7.36163E-23
Deltamethrin                1.91E-09
Dibenz(a,h)anthracene       1.14451E-09
Diflufenican                3.74885E-18
Diflufenzopyr               7.5E-09
Dimethoate                  0.0000036
Dimethyl malonate           0.00025
Ethalfluralin               0.0000085
Fluoranthene                1.86344E-08
Fluorene                    8.18379E-09
Fluquinconazole             3.58937E-18
Fluroxypyr                  5.48504E-18
Fluxapyroxad                0.0000002
Fungicides, unspecified     3.88286E-18
Glufosinate ammonium        0.00000014
Herbicides, unspecified     5.82429E-17
Imidacloprid                5.09564E-19
Indeno(1,2,3-cd)pyrene      5.40864E-09
Iodine                      4.57498E-10
Ketene                      1.38982E-09
Mefentrifluconazole         1.09316E-13
Methylcyclohexane           0.00025
Metsulfuron-methyl          5.27856E-19
N,N-Dimethylformamide       3.87314E-13
Naphthalene                 6.04093E-08
Nitrogen                    5.20858E-12
Oxyfluorfen                 8.69761E-20
Paraquat                    5.04032E-17
Peracetic acid              5.20058E-08
Phenanthrene                4.36693E-07
Pyrene                      1.14006E-08
Saflufenacil                0.000001
Sodium chloroacetate        0.007818092
Sodium methoxide            2.1053E-10
Sulfur dichloride           8.4437E-15
Sulfur trioxide             0.001817198
Thionyl chloride            2.35023E-14
Triallate                   0.000000268
Tribenuron-methyl           0.000000005
Triclopyr                   2.29534E-17
Trifluralin                 1.79647E-16
m-Nitrotoluene              8.88325E-06
o-Nitrotoluene              0.000145939
p-Nitrotoluene              9.51777E-05

内容的提问来源于stack exchange，提问作者Julian