diff --git a/apps/web/process/payments/reactions.ts b/apps/web/process/payments/reactions.ts
index c215858..9926415 100644
--- a/apps/web/process/payments/reactions.ts
+++ b/apps/web/process/payments/reactions.ts
@@ -353,26 +353,19 @@ export default function paymentsReactions({ store }: ReactionsContext) {
   makeDisposable(
     () =>
       reaction(
-        () => {
+        () => toJS($tables.payments.values),
+        (nextPayments, prevPayments) => {
           const graphType = $calculation.element('radioGraphType').getValue();
-          const payments = toJS($tables.payments.values);
           const degressionType = $calculation.element('selectSeasonType').getValue();
 
-          return {
-            degressionType,
-            graphType,
-            payments,
-          };
-        },
-        (nextParams, prevParams) => {
-          if (nextParams.graphType === 100_000_001 && nextParams.degressionType === 100_000_007) {
-            const changes = difference(nextParams.payments, prevParams.payments);
+          if (graphType === 100_000_001 && degressionType === 100_000_007) {
+            const changes = difference(nextPayments, prevPayments);
 
-            if (changes === null || changes.length > 1) return;
+            if (!changes?.length || changes.length > 1) return;
 
             const [changeIndex] = changes;
-            const value = nextParams.payments[changeIndex];
-            const payments = nextParams.payments.slice(1, -1).map((payment, i) => {
+            const value = nextPayments[changeIndex];
+            const payments = nextPayments.slice(1, -1).map((payment, i) => {
               if (i <= changeIndex - 2) return payment;
 
               return value;