When checking for trace rejection messages in a business adapter import, a message like the example below will appear if one of the mandatory fields for an object is not populated in the source data, even if the column isn’t used for matching.
@param_105dd8c94487454398d3d74652d400c9 is a mandatory property - value was not provided;
This message is a SQL parameter. It occurs for properties that are mandatory for the object. For the dynamic SQL to work, the generated parameter name must be unique for the SQL.