Data must be converted any time the version or flavor of the Sage 50 product is changed.
For example:  If you previously installed and converted your data to Sage 50 Complete Accounting 2015, you would need to complete another data conversion if you were to upgrade your version to Sage 50 Premium Accounting 2015.
This process is […]

Resolution for '2015 data issue: 'Why do I have to convert my 2015 data again?' available: Yes.

The 2015 data issue or error code is a known related to Sage Accounting products. 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 data issue yourself by looking for a resolution described in the article. If it is a complex 2015 data issue or you are unable to solve the issue, you may contact Sage Repair by clicking here or by using other 2015 data support options.

For more information about resolving issues related to 2015 data in Sage Accounting or to get support for the issue 'Why do I have to convert my 2015 data again?', click the link below: