In order to migrate page data between Salesforce orgs, we exported the data on object skuid__Page__c to a csv file, and import it to the target org.
During first upsert, it finished without error, but “null” prepended to skuid__UniqueId__c.
2nd time upsert, it will throw error below and upsert failed:
2015-04-10 15:38:21,248 ERROR EUpsert_skuid__Page__c] client.PartnerClient processResult (PartnerClient.java:432) - Errors were found on item1
2015-04-10 15:38:21,248 ERROR EUpsert_skuid__Page__c] client.PartnerClient processResult (PartnerClient.java:434) - Error code is:DUPLICATE_VALUE<br>2015-04-10 15:38:21,248 ERROR EUpsert_skuid__Page__c] client.PartnerClient processResult (PartnerClient.java:435) - Error message:duplicate value found: unknown duplicates value on record with id: a3pZ00000001PHW Could you please help?