Version 4.3.0

applications/core/setup/upg_100038/upgrade.php

@@ -68,7 +68,17 @@ class _Upgrade
 						$poll->votes = $numberOfVotes;
 					}
 				}
-				$poll->save();
+
+				try
+				{
+					$poll->save();
+				}
+				catch( \IPS\Db\Exception $e )
+				{
+					\IPS\Log::log( $e, 'upgrade_error' );
+
+					continue;
+				}
 			}
 		}