From 49d1cdd872c8a41bc26623760ae40256598e04d3 Mon Sep 17 00:00:00 2001
From: Ersan <ersanyakit@yahoo.com.tr>
Date: Sat, 4 May 2019 04:31:58 +0300
Subject: [PATCH] https://github.com/ethereum/web3.js/issues/2778

solved.
---
 .../web3-providers/lib/providers/AbstractSocketProvider.js    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/web3-providers/lib/providers/AbstractSocketProvider.js b/packages/web3-providers/lib/providers/AbstractSocketProvider.js
index 55b6e58c08d..a4dd8aa0a32 100644
--- a/packages/web3-providers/lib/providers/AbstractSocketProvider.js
+++ b/packages/web3-providers/lib/providers/AbstractSocketProvider.js
@@ -203,7 +203,9 @@ export default class AbstractSocketProvider extends EventEmitter {
 
                 delete this.subscriptions[subscriptionId];
 
-                this.subscriptions[key].id = subscriptionId;
+                if(this.subscriptions[key].hasOwnProperty("id")){
+                    this.subscriptions[key].id = subscriptionId;
+                }
             }
         }