diff --git a/README.md b/README.md
index 5ca95615..2d256f7b 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ A short introduction video of an output channel based on the GraphQL query langu
 - To-be-exposed data restriction to endpoints by defining workspaces and schemas.
 
 ## Documentation Overview
-- [Installation](./doc/01_Installation_and_Upgrade/README.md)
+- [Installation](./doc/01_Installation_and_Upgrade/READMEXXXX.mdwerwer)
 - [Basic principle](./doc/02_Basic_Principle.md) for configuring an endpoint
 - [GraphQL](./doc/10_GraphQL/README.md) [*default and recommended endpoint*]
 - [Configuration & Deployment](./doc/20_Deployment.md)
diff --git a/doc/02_Basic_Principle.md b/doc/02_Basic_Principle.md
index 505fc6a9..b169ea83 100644
--- a/doc/02_Basic_Principle.md
+++ b/doc/02_Basic_Principle.md
@@ -1,4 +1,4 @@
-# Basic Principle
+# Basic Principle some change
 
 Pimcore Datahub allows defining multiple endpoints that allow data delivery and consumption. These 
 endpoints are configured via so called configurations that can be added in Pimcore admin user interface: