Comments - Too many key parts specified; max 16 parts allowed
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The error is fairly self-explanatory - there are too many key parts specified. So it would help if you gave some more detail. Share line 129, how was the sql generated before, from what version to what version, etc.
The snipette is part of dump file that I generated while converting MsSQL to MySQL using MySQL Workbench.
Line 129 is highlighted in bold below.