You can close an out of balance  recon with an auto generated adjusting entry and move on but I advise against it. Find the culprit that caused the out of balance and only close balanced recons.

Resolution for 'balanced recons issue: 'when a month doesn’t balance can I a new month be started?' available: Yes.

The balanced recons issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the balanced recons issue yourself by looking for a resolution described in the article. If it is a complex balanced recons issue or you are unable to solve the issue, you may contact us by clicking here or by using other balanced recons support options.

For more information about resolving issues related to balanced recons in Quickbooks/QBO or to get support for the issue 'when a month doesn’t balance can I a new month be started?', click the link below: