diff --git a/Squadrons-and-pilots.md b/Squadrons-and-pilots.md
index 1b01fbd..9573264 100644
--- a/Squadrons-and-pilots.md
+++ b/Squadrons-and-pilots.md
@@ -144,4 +144,8 @@ This can be used for creating Marine Hornet squadrons as in the example above.
 
 ### Generated squadrons
 
-A squadron will be generated for any aircraft that does not have any predefined squadrons available.
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+A squadron will be generated for any aircraft that does not have any predefined squadrons available.
+
+**Note for upcoming version 5.x**
+
+The Squadron file should **NOT** contain the lines related to Pilots, Players or Bases. If you are using a customized squadron yaml file created before 5.0, remove the lines related to Pilots, Players and Bases since this is now managed by Liberation in a different way the the files containing that data would generate an error.
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