diff --git a/frappe/core/doctype/communication/communication.py b/frappe/core/doctype/communication/communication.py
index 5a75b612cc..4908a1b66c 100644
--- a/frappe/core/doctype/communication/communication.py
+++ b/frappe/core/doctype/communication/communication.py
@@ -256,13 +256,11 @@ class Communication(Document):
 				frappe.db.commit()
 
 def on_doctype_update():
-	"""Add index in `tabCommunication` for `(reference_doctype, reference_name)`"""
+	"""Add indexes in `tabCommunication`"""
 	frappe.db.add_index("Communication", ["reference_doctype", "reference_name"])
 	frappe.db.add_index("Communication", ["timeline_doctype", "timeline_name"])
 	frappe.db.add_index("Communication", ["link_doctype", "link_name"])
 	frappe.db.add_index("Communication", ["status", "communication_type"])
-	frappe.db.add_index("Communication", ["communication_date"])
-	frappe.db.add_index("Communication", ["message_id(200)"])
 
 def has_permission(doc, ptype, user):
 	if ptype=="read":
diff --git a/frappe/core/doctype/feedback_trigger/feedback_trigger.py b/frappe/core/doctype/feedback_trigger/feedback_trigger.py
index ca653724d1..9a3abc32e7 100644
--- a/frappe/core/doctype/feedback_trigger/feedback_trigger.py
+++ b/frappe/core/doctype/feedback_trigger/feedback_trigger.py
@@ -33,7 +33,7 @@ def trigger_feedback_request(doc, method):
 
 	def _get():
 		triggers = {}
-		if not frappe.flags.in_migrate:
+		if not (frappe.flags.in_migrate or frappe.flags.in_install):
 			for d in frappe.get_all('Feedback Trigger', dict(enabled=1), ['name', 'document_type']):
 				triggers[d.document_type] = d.name
 
diff --git a/frappe/model/db_schema.py b/frappe/model/db_schema.py
index 6023761bcc..400b873b96 100644
--- a/frappe/model/db_schema.py
+++ b/frappe/model/db_schema.py
@@ -307,13 +307,13 @@ class DbTable:
 			if not frappe.db.sql("show index from `%s` where key_name = %s" %
 					(self.name, '%s'), col.fieldname):
 				query.append("add index `{}`(`{}`)".format(col.fieldname, col.fieldname))
-
+		
 		for col in self.drop_index:
 			if col.fieldname != 'name': # primary key
 				# if index key exists
 				if frappe.db.sql("""show index from `{0}`
 					where key_name=%s
-					and Non_unique=%s""".format(self.name), (col.fieldname, 1 if col.unique else 0)):
+					and Non_unique=%s""".format(self.name), (col.fieldname, 0 if col.unique else 1)):
 					query.append("drop index `{}`".format(col.fieldname))
 
 		for col in self.set_default:
diff --git a/frappe/model/meta.py b/frappe/model/meta.py
index 23513beea5..f1a4916cd3 100644
--- a/frappe/model/meta.py
+++ b/frappe/model/meta.py
@@ -304,7 +304,7 @@ class Meta(Document):
 
 	def set_custom_permissions(self):
 		'''Reset `permissions` with Custom DocPerm if exists'''
-		if frappe.flags.in_patch or frappe.flags.in_import:
+		if frappe.flags.in_patch or frappe.flags.in_import or frappe.flags.in_install:
 			return
 
 		if not self.istable and self.name not in ('DocType', 'DocField', 'DocPerm',
diff --git a/frappe/patches.txt b/frappe/patches.txt
index b44cdc6f9f..d4a4966040 100644
--- a/frappe/patches.txt
+++ b/frappe/patches.txt
@@ -162,6 +162,7 @@ frappe.patches.v7_2.set_doctype_engine
 frappe.patches.v7_2.merge_knowledge_base
 frappe.patches.v7_0.update_report_builder_json
 frappe.patches.v7_2.set_in_standard_filter_property #1
+frappe.patches.v8_0.drop_unwanted_indexes
 execute:frappe.db.sql("update tabCommunication set communication_date = creation where time(communication_date) = 0")
 frappe.patches.v7_2.fix_email_queue_recipient
 frappe.patches.v7_2.update_feedback_request # 2017-02-27
diff --git a/frappe/patches/v8_0/drop_unwanted_indexes.py b/frappe/patches/v8_0/drop_unwanted_indexes.py
new file mode 100644
index 0000000000..fc66ed43fd
--- /dev/null
+++ b/frappe/patches/v8_0/drop_unwanted_indexes.py
@@ -0,0 +1,17 @@
+# Copyright (c) 2017, Frappe and Contributors
+# License: GNU General Public License v3. See license.txt
+# -*- coding: utf-8 -*-
+
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	# communication
+	unwanted_indexes = ["communication_date_index", "message_id_index", "modified_index", 
+		"creation_index", "reference_owner", "communication_date"]
+		
+	for k in unwanted_indexes:
+		try:
+			frappe.db.sql("drop index {0} on `tabCommunication`".format(k))
+		except:
+			pass
\ No newline at end of file