You Restore the 2015 Premier Backup using the Enterprise 2016 program, which will warn you this file is being Updated AND Upgraded.
Resolution for '2015 Premier Backup issue: 'Can we upgrade DIRECTLY from Premier 2015 to Enterprise 2016?' available: Yes.
The 2015 Premier Backup 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 2015 Premier Backup issue yourself by looking for a resolution described in the article. If it is a complex 2015 Premier Backup issue or you are unable to solve the issue, you may contact us by clicking here or by using other 2015 Premier Backup support options.
For more information about resolving issues related to 2015 Premier Backup in Quickbooks/QBO or to get support for the issue 'Can we upgrade DIRECTLY from Premier 2015 to Enterprise 2016?', click the link below: