[LE] Creation Kit: "Combined key ref errors for cells." Anyone else run into this error?

[SonOfDurotan]

I looked through old posts and google and what not, but I don't seem to be able to find out more about this error which is causing my CK to fail to load. It happens when I try to load a custom patch of mine, and it seems to be referring to a Worldspace/Cell issue, but neither of those types of records are in the patch. Anyone know anything about this?

 

Thanks in advance!