An issue does not get synchronized and appears in the troubleshooting section with the category 'Invalid regex syntax' and the message, e.g. 'Invalid regex syntax for version field 'versions': Illegal repetition near index 4\2345{ ^'.


You configured a regex for the mentioned field which is not valid.


Follow these steps in order to resolve it:

  • Please edit the fieldmapping for the corresponding field in the Backbone configuration and correct the regex. The regular expression will be executed in Java, so you can use any regular expression which works in Java.
  • Perform a resync for this issue.