diff --git a/src/MiniDocs/LeDatabase.extension.st b/src/MiniDocs/LeDatabase.extension.st
index 5e4c0cd..5fd5a76 100644
--- a/src/MiniDocs/LeDatabase.extension.st
+++ b/src/MiniDocs/LeDatabase.extension.st
@@ -25,8 +25,10 @@ LeDatabase >> addPageFromMarkdeep: markdeepDocTree [
 	snippets do: [ :snippet | page addSnippet: snippet ].
 	page children collect: [ :snippet | 
 		(self hasBlockUID: (snippet uid))
-			ifTrue: [ ^ self pages detect: [ :pageTemp |
-				pageTemp includesSnippetUid: snippet uid ] ]
+			ifTrue: [ | existingPage |
+				existingPage := self pages detect: [ :pageTemp |
+					pageTemp includesSnippetUid: snippet uid ].
+				^ self importErrorMessage: existingPage. ]
 			ifFalse: [
 				snippet database: self.
 				self registerSnippet: snippet ] ].