diff --git a/frontend/src/Store/Actions/Creators/createHandleActions.js b/frontend/src/Store/Actions/Creators/createHandleActions.js
index dc7b9cbd6..36a103da1 100644
--- a/frontend/src/Store/Actions/Creators/createHandleActions.js
+++ b/frontend/src/Store/Actions/Creators/createHandleActions.js
@@ -72,8 +72,9 @@ export default function createHandleActions(handlers, defaultState, section) {
       if (section === baseSection) {
         const newState = getSectionState(state, payloadSection);
         const items = newState.items;
+        const itemMap = newState.itemMap ?? {};
 
-        const index = payload.id in newState.itemMap ? newState.itemMap[payload.id] : -1;
+        const index = payload.id in itemMap ? itemMap[payload.id] : -1;
 
         newState.items = [...items];
 
@@ -92,7 +93,7 @@ export default function createHandleActions(handlers, defaultState, section) {
         } else if (!updateOnly) {
           const newIndex = newState.items.push({ ...otherProps }) - 1;
 
-          newState.itemMap = { ...newState.itemMap };
+          newState.itemMap = { ...itemMap };
           newState.itemMap[payload.id] = newIndex;
         }
 
diff --git a/frontend/src/Store/Actions/importSeriesActions.js b/frontend/src/Store/Actions/importSeriesActions.js
index 04db50092..347d7b572 100644
--- a/frontend/src/Store/Actions/importSeriesActions.js
+++ b/frontend/src/Store/Actions/importSeriesActions.js
@@ -221,12 +221,12 @@ export const actionHandlers = handleThunks({
     const addedIds = [];
 
     const allNewSeries = ids.reduce((acc, id) => {
-      const item = _.find(items, { id });
+      const item = items.find((i) => i.id === id);
       const selectedSeries = item.selectedSeries;
 
       // Make sure we have a selected series and
       // the same series hasn't been added yet.
-      if (selectedSeries && !_.some(acc, { tvdbId: selectedSeries.tvdbId })) {
+      if (selectedSeries && !acc.some((a) => a.tvdbId === selectedSeries.tvdbId)) {
         const newSeries = getNewSeries(_.cloneDeep(selectedSeries), item);
         newSeries.path = item.path;
 
@@ -318,7 +318,7 @@ export const reducers = createHandleActions({
   [SET_IMPORT_SERIES_VALUE]: function(state, { payload }) {
     const newState = getSectionState(state, section);
     const items = newState.items;
-    const index = _.findIndex(items, { id: payload.id });
+    const index = items.findIndex((item) => item.id === payload.id);
 
     newState.items = [...items];