diff --git a/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx b/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx
index b3594de8f6..69091210f3 100644
--- a/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx
+++ b/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx
@@ -180,22 +180,22 @@ function SettingsForm(props: PropType) {
               label={t("xpansion.solver")}
               data={currentSettings.solver || ""}
               handleChange={handleChange}
+              optional
               sx={{
                 minWidth: "100%",
               }}
-              optional
-            />
-            <TextField
-              type="number"
-              label={t("xpansion.batchSize")}
-              variant="filled"
-              value={currentSettings.batch_size || ""}
-              onChange={(e) =>
-                handleChange("batch_size", parseInt(e.target.value, 10))
-              }
-              sx={{ mb: 1 }}
             />
           </SelectFields>
+          <TextField
+            type="number"
+            label={t("xpansion.batchSize")}
+            variant="filled"
+            value={currentSettings.batch_size || ""}
+            onChange={(e) =>
+              handleChange("batch_size", parseInt(e.target.value, 10))
+            }
+            sx={{ mb: 1 }}
+          />
           <TextField
             type="number"
             label={t("xpansion.timeLimit")}