diff --git a/frappe/__init__.py b/frappe/__init__.py
index 853dbc1204..d0f9e4143f 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -24,7 +24,7 @@ if sys.version[0] == '2':
 	reload(sys)
 	sys.setdefaultencoding("utf-8")
 
-__version__ = '11.1.11'
+__version__ = '11.1.12'
 __title__ = "Frappe Framework"
 
 local = Local()
diff --git a/frappe/chat/doctype/chat_message/chat_message.py b/frappe/chat/doctype/chat_message/chat_message.py
index 657009b2c1..677b850e8e 100644
--- a/frappe/chat/doctype/chat_message/chat_message.py
+++ b/frappe/chat/doctype/chat_message/chat_message.py
@@ -141,13 +141,16 @@ def send(user, room, content, type = "Content"):
 def seen(message, user = None):
 	authenticate(user)
 
-	mess = frappe.get_doc('Chat Message', message)
-	mess.add_seen(user)
+	has_message = frappe.db.exists('Chat Message', message)
 
-	room = mess.room
-	resp = dict(message = message, data = dict(seen = json.loads(mess._seen)))
+	if has_message:
+		mess = frappe.get_doc('Chat Message', message)
+		mess.add_seen(user)
 
-	frappe.publish_realtime('frappe.chat.message:update', resp, room = room, after_commit = True)
+		room = mess.room
+		resp = dict(message = message, data = dict(seen = json.loads(mess._seen)))
+
+		frappe.publish_realtime('frappe.chat.message:update', resp, room = room, after_commit = True)
 
 def history(room, fields = None, limit = 10, start = None, end = None):
 	room = frappe.get_doc('Chat Room', room)
@@ -194,18 +197,21 @@ def mark_messages_as_seen(message_names, user):
 def get(name, rooms = None, fields = None):
 	rooms, fields = safe_json_loads(rooms, fields)
 
-	dmess = frappe.get_doc('Chat Message', name)
-	data  = dict(
-		name      = dmess.name,
-		user      = dmess.user,
-		room      = dmess.room,
-		room_type = dmess.room_type,
-		content   = json.loads(dmess.content) if dmess.type in ["File"] else dmess.content,
-		type      = dmess.type,
-		urls      = dmess.urls,
-		mentions  = dmess.mentions,
-		creation  = dmess.creation,
-		seen      = get_if_empty(dmess._seen, [ ])
-	)
+	has_message = frappe.db.exists('Chat Message', name)
 
-	return data
\ No newline at end of file
+	if has_message:
+		dmess = frappe.get_doc('Chat Message', name)
+		data  = dict(
+			name      = dmess.name,
+			user      = dmess.user,
+			room      = dmess.room,
+			room_type = dmess.room_type,
+			content   = json.loads(dmess.content) if dmess.type in ["File"] else dmess.content,
+			type      = dmess.type,
+			urls      = dmess.urls,
+			mentions  = dmess.mentions,
+			creation  = dmess.creation,
+			seen      = get_if_empty(dmess._seen, [ ])
+		)
+
+		return data
\ No newline at end of file
diff --git a/frappe/core/doctype/user/user.py b/frappe/core/doctype/user/user.py
index e746914399..1dfa0ff114 100644
--- a/frappe/core/doctype/user/user.py
+++ b/frappe/core/doctype/user/user.py
@@ -328,6 +328,12 @@ class User(Document):
 			and reference_doctype='User'
 			and (reference_name=%s or owner=%s)""", (self.name, self.name))
 
+		# unlink contact
+		frappe.db.sql("""update `tabContact`
+			set user=null
+			where user=%s""", (self.name))
+
+
 	def before_rename(self, old_name, new_name, merge=False):
 		self.check_demo()
 		frappe.clear_cache(user=old_name)
diff --git a/frappe/workflow/doctype/workflow_action/workflow_action.py b/frappe/workflow/doctype/workflow_action/workflow_action.py
index 33992b1a6c..45a4db247e 100644
--- a/frappe/workflow/doctype/workflow_action/workflow_action.py
+++ b/frappe/workflow/doctype/workflow_action/workflow_action.py
@@ -174,9 +174,6 @@ def create_workflow_actions_for_users(users, doc):
 			'user': user
 		}).insert(ignore_permissions=True)
 
-	frappe.db.commit()
-
-
 def send_workflow_action_email(users_data, doc):
 	common_args = get_common_email_args(doc)
 	message = common_args.pop('message', None)