1 files changed, 7 insertions, 0 deletions

diff --git a/Mailman/versions.py b/Mailman/versions.py
index 484b244c0..c5ba343bd 100644
--- a/Mailman/versions.py
+++ b/Mailman/versions.py
@@ -46,6 +46,7 @@ from Mailman.Logging.Syslog import syslog
 
 def Update(l, stored_state):
     "Dispose of old vars and user options, mapping to new ones when suitable."
+    ZapOldVars(l)
     NewVars(l)
     UpdateOldVars(l, stored_state)
     UpdateOldUsers(l)
@@ -54,6 +55,12 @@ def Update(l, stored_state):
 
 
 
+def ZapOldVars(l):
+    if hasattr(l, 'num_spawns'):
+        del l.num_spawns
+
+
+
 uniqueval = []
 def UpdateOldVars(l, stored_state):
     """Transform old variable values into new ones, deleting old ones.