diff --git a/product/CMFActivity/ActiveObject.py b/product/CMFActivity/ActiveObject.py
index 11f2874a4892de637d3616d8c6563b754c8e368f..3b4a25c5429c6a288e59ec950fa48a13dee4a26c 100644
--- a/product/CMFActivity/ActiveObject.py
+++ b/product/CMFActivity/ActiveObject.py
@@ -29,7 +29,6 @@
 import ExtensionClass
 from AccessControl import ClassSecurityInfo
 from Acquisition import aq_base
-from ZODB.POSException import ConflictError
 from Products.CMFCore.utils import getToolByName
 from Products.ERP5Type.TransactionalVariable import getTransactionalVariable
 from ActivityRuntimeEnvironment import getActivityRuntimeEnvironment
@@ -39,9 +38,6 @@ try:
 except ImportError:
   from Products.CMFCore import CMFCorePermissions as permissions
 
-from zLOG import LOG, WARNING
-import sys
-
 DEFAULT_ACTIVITY = 'SQLDict'
 
 # Processing node are used to store processing state or processing node