diff --git a/frappe/patches/v7_1/rename_scheduler_log_to_error_log.py b/frappe/patches/v7_1/rename_scheduler_log_to_error_log.py
index a94963130b..cb2dcf67a7 100644
--- a/frappe/patches/v7_1/rename_scheduler_log_to_error_log.py
+++ b/frappe/patches/v7_1/rename_scheduler_log_to_error_log.py
@@ -4,4 +4,7 @@ def execute():
 	if not 'tabError Log' in frappe.db.get_tables():
 		frappe.rename_doc('DocType', 'Scheduler Log', 'Error Log')
 		frappe.db.commit()
+		frappe.db.sql("""delete from `tabError Log` where datediff(curdate(), creation) > 30""")
+		frappe.db.sql('alter table `tabError Log` change column name name varchar(140)')
+		frappe.db.sql('alter table `tabError Log` change column parent parent varchar(140)')
 		frappe.db.sql('alter table `tabError Log` engine=MyISAM')
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