I'm trying to deploy changes from one sandbox to another using the Migration Tool, but I keep getting the following error: Error: objects/Contact.object(263,13): Concurrent modification from setup pages

What causes this error, and how can I deal with it?

  • I've verified that my Contact.object file is well-formed and valid
  • I have not been making any other changes simultaneously through the setup pages or by any other means
  • The location specified (263,13) is the start of a <fields> element for a custom field in the middle of the definition file. This picklist field already exists in the destination environment, but I am changing some of its values
  • Never seen this before, and I have deployed code using the Migration tool thousands of times. If it still happens after a few hours, you're probably going to want to file a case. Please update this question with the solution if/when you find it. – jkraybill May 2 '13 at 5:47
  • I'm still seeing this on the AccountContactRole object. – user3202 Jul 3 '13 at 17:22

We just experienced this same issue. We saw which field was causing the problem by the IDE reporting the error. The target org had a picklist field that was modified later than the source and had different values. We changed the target picklist values to match the source and the deployment then succeeded.

  • I just saw this again as well; have logged a support case and will let you know what I learn. – Benj May 14 '13 at 13:56

This behavior appears to have been caused by a known platform bug. According to SFDC, the issue has been resolved.

  • Interesting...my error wasn't with a dependent picklist. Just a plain old picklist. – Peter Knolle Jul 4 '13 at 0:57
  • Ditto, still getting this for a plain vanilla account picklist. Changing the api versions as suggested in the bug report as a workaround wasn't any help. – Ralph Callaway Jul 23 '13 at 15:35

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