I realized that the invoice added an entry to my FA Cost account for the sales price.

If you used an Item linked to the FA Cost account, then it should reduce not add to the cost, by the sales price.

So the cost needs to be reduced to zero.

Journal Entry:

Credit FA Cost […]

Resolution for 'acc dep issue: 'Sell a fixed asset using an invoice' available: Yes.

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

For more information about resolving issues related to acc dep in Quickbooks/QBO or to get support for the issue 'Sell a fixed asset using an invoice', click the link below: