Subscriptions doctype - subscriber should be set only once
diff --git a/erpnext/accounts/doctype/subscriptions/subscriptions.json b/erpnext/accounts/doctype/subscriptions/subscriptions.json
index f572c92..b2a5af6 100644
--- a/erpnext/accounts/doctype/subscriptions/subscriptions.json
+++ b/erpnext/accounts/doctype/subscriptions/subscriptions.json
@@ -41,7 +41,7 @@
    "report_hide": 0, 
    "reqd": 1, 
    "search_index": 0, 
-   "set_only_once": 0, 
+   "set_only_once": 1, 
    "translatable": 0, 
    "unique": 0
   }, 
@@ -625,7 +625,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-02-26 16:13:09.759890", 
+ "modified": "2018-02-26 20:34:47.418645", 
  "modified_by": "Administrator", 
  "module": "Accounts", 
  "name": "Subscriptions",