FAULT B det type mismatch

We recently swapped out an EPC from an Agilent 6890 (with 5973 MS) in order to troubleshoot another 6890.  Once the troubleshooting was complete the EPC was reinstalled.  I now get a FAULT "B det type mismatch" that does not allow the GC to reach a ready state.  Other than the 5973 MS, there are no other detectors connected to this GC.  How can I fix or clear this FAULT?

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