diff --git a/System-Setup.md b/System-Setup.md
index a5a8dc6..161aa19 100644
--- a/System-Setup.md
+++ b/System-Setup.md
@@ -232,3 +232,7 @@ If your devices never connect and network lights stay off, check out [this page]
 | Wrong Version | Duplicate Unit ID |
 | --- | --- |
 | <img width="350" alt="image" src="https://github.com/MikaylaFischler/cc-mek-scada/assets/2926271/c577904c-543e-474e-b609-a1ffa1236d4a"> | <img width="350" alt="image" src="https://github.com/MikaylaFischler/cc-mek-scada/assets/2926271/6a8665e9-e3f5-4e5f-9913-43d017eafbfc"> |
+
+If your coordinator and supervisor have different settings for how many reactor units you have, you'll see this. You need to make sure both numbers match in their respective configurations.
+
+![image](https://github.com/MikaylaFischler/cc-mek-scada/assets/2926271/a7deadfe-9f67-4b0d-ab90-131f7e2772f5)