From 08e425bcf62b0b4b4cbb728a888435fa1d4b70e6 Mon Sep 17 00:00:00 2001
From: Jeremy Cohen <jeremy@fishtownanalytics.com>
Date: Wed, 16 Dec 2020 00:24:00 -0500
Subject: [PATCH] Handle keyerror if old node missing

---
 core/dbt/contracts/graph/manifest.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/dbt/contracts/graph/manifest.py b/core/dbt/contracts/graph/manifest.py
index 48f68bba150..e3a750e7a66 100644
--- a/core/dbt/contracts/graph/manifest.py
+++ b/core/dbt/contracts/graph/manifest.py
@@ -899,8 +899,8 @@ def merge_from_artifact(
         refables = set(NodeType.refable())
         merged = set()
         for unique_id, node in other.nodes.items():
-            current = self.nodes[unique_id]
-            if (
+            current = self.nodes.get(unique_id)
+            if current and (
                 node.resource_type in refables and
                 not node.is_ephemeral and
                 unique_id not in selected and