Attempt to set column
"DOCUMENTGROUP.DOCG_INDEX" to two different values: "0", "1" This usually
occurs when you map different fields to the same column, but you do not
keep the values of these fields in synch.
Attempt to set column "my_table.version_number" to two different values:
(java.lang.Integer)"27", (java.lang.Integer)"29" This can occur when you fail to set both sides of a two-sided relation between objects, or when you map different fields to the
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