PM Order Type ZPM1 Investment Order Indicator

SAP Forum,

I haven't been able to find anything about this specific situation, so here goes:

We have two order types (PM06 & ZPM1) with the investment order indicator checked on:

I need to un-check this order indicator for ZPM1. So I went into config to do so:

And it isn't showing ZPM1 anywhere:

The strange part is that when I attempt to create a new entry with ZPM1, there's an error saying that it already exists:

Does anyone know where I could uncheck this indicator for ZPM1?

*Also, the field name (IMORD) is the same in the table as it is in config.

Thanks,

Colin