If the adjustment is for 2017, then you should change the date.
Resolution for 'adjustment date issue: 'inventory adjustment date' available: Yes.
The adjustment date 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 adjustment date issue yourself by looking for a resolution described in the article. If it is a complex adjustment date issue or you are unable to solve the issue, you may contact us by clicking here or by using other adjustment date support options.
For more information about resolving issues related to adjustment date in Quickbooks/QBO or to get support for the issue 'inventory adjustment date', click the link below: