Use the Ignore Issue checkbox if you want AccuSync to skip the associated issue during subsequent synchronizations. You might want to suspend synchronization for an issue that is reporting errors while you troubleshoot the cause in order to eliminate repetitive entries in the Errors table (and to suppress email notification, if you have enabled it).
AccuSync will not attempt to synchronize the issue as long as the Ignore Issue checkbox is checked. Once you have identified and addressed the root cause, clear the Ignore Issue checkbox and AccuSync will try to synchronize the issue again.