AGIS - Supplier Association no longer exists

This isn't a question, more of a tip for anyone who runs into this issue. We encountered it last week and I was able to resolve it by sheer luck.

We use AGIS to process our intercompany transactions between our US and foreign entities. We have it set up to go into AR and AP, due to reporting/audit requirements for our foreign subs. Last week, the batches from one foreign entity to our US entity were failing validation because there was no supplier association defined, where there had been one before.

I tried creating another association, but got an error stating that the site name already existed and I was not able to save it. The AGIS supplier association was originally defined to use the site named "INTERCOMPANY." After some investigation, I found that in AP, the site name had been changed to something else. This caused a disconnect between AP and AGIS, and the supplier association was no longer there. When I changed the site name back to "INTERCOMPANY" I was able to re-create the supplier association and the batches validated and were placed into the approval queue.