Launchpad #164783: Indexes were migrated on initial creation of a ZODB.

doc/CHANGES.txt

@@ -182,6 +182,9 @@ Zope Changes
 
     Bugs Fixed
 
+      - Launchpad #164783: Indexes were migrated on initial creation of a
+        ZODB.
+
       - Launchpad #151020: HTTP_CHAR_SET headers containing 'x-user-defined'
         caused a LookupError exception. Unknown encodings are from now on
         silently discarded.

lib/python/Products/ZCatalog/ZCatalog.py

@@ -177,6 +177,7 @@ class ZCatalog(Folder, Persistent, Implicit):
         self._v_total = 0
 
         self._catalog = Catalog()
+        self._migrated_280 = True
 
     def __len__(self):
         # Perform a migration of _catalog.__len__ to _catalog._length