How to find History Provider set to null

I am getting the following error on a project with about 10k tags:

java.lang.IllegalArgumentException: Specified historical sink ‘null’ does not exist.

at com.inductiveautomation.ignition.gateway.history.HistoryManagerImpl.storeHistory(

This project was built by a third party but I have spent a bit of time learning it. They had left another history provider in some of the tags. In its case, all I had to do was search for its name (‘splitter’) and replace with the name that is used for this project (‘mySQL’).

In the case of the null value, I cannot figure out how to search for it. I tried exporting the json and doing some regex to look but it is hard to search for something that is not there. Is there any way to get Ignition to give me a list of all the tags that are set to record history but have a null value in history provider value? Or is there a way to get the logger to tell me the actual tag path(s) that are trying to log history with a null history provider?