<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1494353374557_5988" dir="ltr">one possibility I see is that your target resource may be having duplicate rows with the key-column value; or the key column you provided is not unique on the target resource. Did you verify?</div><div id="yui_3_16_0_ym19_1_1494353374557_5988" dir="ltr"><br></div></div></body></html>