You, or someone on your behalf, needs to file an appeal. If you are not thoroughly comfortable with the legal process, you should probably hire an attorney or a non-attorney rep (like someone from Allsup) to do it for you.

The ALJ may or may not have written the decision, btw. A staff member could have written the decision and made the error.

An error about the medical evidence could be enough for a remand, but there are other possibly additional judicial errors that you're missing.