Thank you for the detailed description. I was able to reproduce the exception. The problem is with long table names. If the table name is beyond a certain length the parts of generated sequence name are truncated. Although we do read the sequence name while reading the schema, this name is not used while obtaining the generated sequence value. This is a bug and we will fix it.
I'm afraid I do not have a workaround at the moment apart from using a shorter table name.
I apologize for the inconvenience caused.
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