Insights IoP does not support an external database (#4353)

Co-authored-by: Aneta Šteflová Petrová <[email protected]>

Author: Lennonka

guides/common/modules/con_installing-and-configuring-insights-iop.adoc

@@ -8,6 +8,8 @@ When you install {insights-iop} locally, you can generate {Insights} recommendat
 
 [IMPORTANT]
 ====
-With {insights-iop} enabled, you cannot use the hosted {Insights} services for hosts registered to your {Project}.
+* With {insights-iop} enabled, you cannot use the hosted {Insights} services for hosts registered to your {Project}.
 Enabling {insights-iop} prevents you from using any {RHCloud} services on hosts registered to {Project}.
+* If you install {Project} with external databases, you cannot enable {insights-iop}.
+Enabling {insights-iop} prevents you from using external databases.
 ====