Index: typo3/sysext/scheduler/ext_tables.sql
===================================================================
--- typo3/sysext/scheduler/ext_tables.sql	(revision 6310)
+++ typo3/sysext/scheduler/ext_tables.sql	(working copy)
@@ -10,8 +10,8 @@
 	lastexecution_time int(11) unsigned DEFAULT '0' NOT NULL,
 	lastexecution_failure text NOT NULL,
 	lastexecution_context char(3) DEFAULT '' NOT NULL,
-	serialized_task_object blob NOT NULL,
-	serialized_executions blob NOT NULL,
+	serialized_task_object blob,
+	serialized_executions blob,
 	PRIMARY KEY (uid),
 	KEY index_nextexecution (nextexecution)
 );