diff --git a/src/jcloud_docsgen/exceptions.py b/src/jcloud_docsgen/exceptions.py
index f6922d4..3cbc18f 100644
--- a/src/jcloud_docsgen/exceptions.py
+++ b/src/jcloud_docsgen/exceptions.py
@@ -27,4 +27,5 @@ class NamespaceError(ValueError):
             return f'{self.args[0]}{": " if self.namespace_identifier and self.args[0] else ""}{self.namespace_identifier if self.args[0] else ""}'
         
 class InvalidNamespaceError(NamespaceError): ...
-class NamespaceNotFoundError(NamespaceError): ...
\ No newline at end of file
+class NamespaceNotFoundError(NamespaceError): ...
+class NamespaceExistsError(NamespaceError): ...
\ No newline at end of file