diff --git a/src/fields/hooks/beforeChange/promise.ts b/src/fields/hooks/beforeChange/promise.ts
index ea97983c96..02adf39dde 100644
--- a/src/fields/hooks/beforeChange/promise.ts
+++ b/src/fields/hooks/beforeChange/promise.ts
@@ -154,6 +154,14 @@ export const promise = async ({
   }
 
   switch (field.type) {
+    case 'select': {
+      if (siblingData[field.name] === null) {
+        siblingData[field.name] = undefined;
+      }
+
+      break;
+    }
+
     case 'point': {
       // Transform point data for storage
       if (Array.isArray(siblingData[field.name]) && siblingData[field.name][0] !== null && siblingData[field.name][1] !== null) {