Fixing zopefoundation#83

Fixing zopefoundation#83 by being more careful
gogobd · Apr 9, 2021 · f03b66c · f03b66c
1 parent 798cb00
commit f03b66c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Products/GenericSetup/registry.py b/src/Products/GenericSetup/registry.py
@@ -435,7 +435,7 @@ def registerStep(self, id, version=None, handler=None, dependencies=(),
         if handler is None:
             raise ValueError('No handler specified')
 
-        if already and already['version'] > version:
+        if already and already['version'] and already['version'] > version:
             raise KeyError('Existing registration for step %s, version %s'
                            % (id, already['version']))