diff --git a/app/imports/api/engine/computation/utility/assignDependencyGroups.js b/app/imports/api/engine/computation/utility/assignDependencyGroups.js
deleted file mode 100644
index 7a660adf..00000000
--- a/app/imports/api/engine/computation/utility/assignDependencyGroups.js
+++ /dev/null
@@ -1,73 +0,0 @@
-import { union } from "lodash";
-
-export function assignDependencyGroups(graph) {
-  console.log('assigning dep group ids');
-  graph.forEachLink(function (link) {
-    console.dir(link);
-  });
-  // Iterate through all the nodes
-  graph.forEachNode(node => {
-    if (node._depGroupVisited) {
-      return;
-    }
-
-    // DFS all the connected nodes to this node, mark visited, put in a group,
-    // store the lowest ordered id
-    const group = [];
-    const stack = [node];
-    let top, lowestOrderId, lowestOrder;
-    while (stack.length) {
-      top = stack.pop();
-      if (top._depGroupVisited) continue;
-      if (top.data?._id && (
-        lowestOrderId === undefined ||
-        top.data?.order < lowestOrder
-      )) {
-        lowestOrderId = top.data._id;
-        lowestOrder = top.data.order;
-      }
-      group.push(top)
-      top._depGroupVisited = true;
-      graph.forEachLinkedNode(top.id, linkedNode => stack.push(linkedNode));
-    }
-    // Assign group id
-    group.forEach(node => {
-      if (!node.data?._id) return;
-      if (group.length > 1) {
-        node.data.depGroupId = lowestOrderId;
-      } else {
-        delete node.data.depGroupId;
-      }
-    });
-  });
-}
-
-
-export default function assignDependencyGroups2(graph) {
-  const groups = new Set();
-  graph.forEachLink(function (link) {
-    const from = graph.getNode(link.fromId);
-    const to = graph.getNode(link.toId);
-    let depGroup;
-    if (from._depGroup) {
-      depGroup = from._depGroup;
-      groups.delete(to._depGroup);
-    } else if (to._depGroup) {
-      depGroup = to._depGroup;
-    } else {
-      depGroup = {};
-      groups.add(depGroup);
-    }
-    depGroup.nodes = union(from._depGroup?.nodes, to._depGroup?.nodes, [from, to])
-    from._depGroup = depGroup;
-    to._depGroup = depGroup;
-  });
-  groups.forEach(g => {
-    if (!g.nodes.length) return;
-    const rootId = g.nodes[0].id;
-    g.nodes.forEach(n => {
-      if (!n.data?._id) return;
-      n.data.depGroupId = rootId;
-    });
-  });
-}
diff --git a/app/imports/api/engine/loadCreatures.js b/app/imports/api/engine/loadCreatures.js
index c6021b22..e6336680 100644
--- a/app/imports/api/engine/loadCreatures.js
+++ b/app/imports/api/engine/loadCreatures.js
@@ -107,6 +107,7 @@ class LoadedCreature {
   }
   changeMap(id, fields, map) {
     const doc = map.get(id);
+    if (!doc) return;
     for (let key in fields) {
       if (key === undefined) {
         delete doc[key];