diff --git a/front/src/reducers/osrdconf/stdcmConf/index.ts b/front/src/reducers/osrdconf/stdcmConf/index.ts
index 12186a2ac29..6bf713d8fee 100644
--- a/front/src/reducers/osrdconf/stdcmConf/index.ts
+++ b/front/src/reducers/osrdconf/stdcmConf/index.ts
@@ -12,7 +12,7 @@ import { defaultCommonConf, buildCommonConfReducers } from 'reducers/osrdconf/os
 import type { OsrdStdcmConfState, StdcmPathStep } from 'reducers/osrdconf/types';
 import { addElementAtIndex } from 'utils/array';
 import { isArrivalDateInSearchTimeWindow } from 'utils/date';
-import type { ArrayElement } from 'utils/types';
+import type { ArrayElement, PickAndNonNullableFields } from 'utils/types';
 
 const DEFAULT_TOLERANCE = 1800; // 30min
 
@@ -135,17 +135,18 @@ export const stdcmConfSlice = createSlice({
     },
     updateStdcmEnvironment(
       state: Draft<OsrdStdcmConfState>,
-      action: PayloadAction<{
-        infraID: number;
-        timetableID: number;
-        searchDatetimeWindow?: {
-          begin: Date;
-          end: Date;
-        };
-        electricalProfileSetId?: number;
-        temporarySpeedLimitGroupId?: number;
-        workScheduleGroupId?: number;
-      }>
+      action: PayloadAction<
+        PickAndNonNullableFields<
+          OsrdStdcmConfState,
+          | 'infraID'
+          | 'timetableID'
+          | 'electricalProfileSetId'
+          | 'workScheduleGroupId'
+          | 'temporarySpeedLimitGroupId'
+          | 'searchDatetimeWindow',
+          'infraID' | 'timetableID'
+        >
+      >
     ) {
       const { searchDatetimeWindow } = action.payload;
       state.infraID = action.payload.infraID;
diff --git a/front/src/utils/types.ts b/front/src/utils/types.ts
index 4d3d8598743..442110020ef 100644
--- a/front/src/utils/types.ts
+++ b/front/src/utils/types.ts
@@ -19,3 +19,29 @@ export const mapBy = <K extends keyof T, T>(items: T[] | undefined, key: K): Map
 
 export const concatMap = <K, V>(map1: Map<K, V>, map2: Map<K, V>) =>
   new Map([...map1.entries(), ...map2.entries()]);
+
+/**
+ * Transform the provided keys of an object to be non-nullable.
+ *
+ * -? removes the optional modifier
+ *
+ * NonNullable removes the nullable modifier
+ * @param Type The object type we want to transform
+ * @param K The keys we want to make non-nullable
+ * @example NonNullableObject<{ a?: string | null; b?: string; c?: string }, 'a' | 'c'> = { a: string; b?: string; c: string }
+ */
+type NonNullableObject<Type, K extends keyof Type> = {
+  [Property in keyof Type as Property extends K ? Property : never]-?: NonNullable<Type[Property]>;
+} & {
+  [Property in keyof Type as Property extends K ? never : Property]: Type[Property];
+};
+
+/**
+ * Shortcut type to pick some properties of an object and make some of them non-nullable.
+ * @example PickAndNonNullableFields<{ a?: string | null; b?: string; c?: string }, 'a' | 'c', 'a'> = { a: string; c?: string }
+ */
+export type PickAndNonNullableFields<
+  Type,
+  PickKeys extends keyof Type,
+  TransformKeys extends keyof Type,
+> = NonNullableObject<Pick<Type, PickKeys>, Extract<TransformKeys, PickKeys>>;