odd I just tried mine and it works as expected
In Desktop, back up the file then use the main menu File>Utilities>Rebuild and  run it as many times as necessary (but at least 3 times) until it completes, then run verify (if there are still errors run rebuld again), then close […]

Resolution for 'completely delete issue: 'How do you change an account that was mapped to a 1099? Even changing it to “omit these payments from 1099” does NOT work. How do I completely delete it from the mapping?' available: Yes.

The completely delete 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 completely delete issue yourself by looking for a resolution described in the article. If it is a complex completely delete issue or you are unable to solve the issue, you may contact us by clicking here or by using other completely delete support options.

For more information about resolving issues related to completely delete in Quickbooks/QBO or to get support for the issue 'How do you change an account that was mapped to a 1099? Even changing it to “omit these payments from 1099” does NOT work. How do I completely delete it from the mapping?', click the link below: