Updated the files.

my-app/node_modules/schema-utils/dist/keywords/undefinedAsNull.js

@@ -0,0 +1,37 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+/** @typedef {import("ajv").default} Ajv */
+/** @typedef {import("ajv").SchemaValidateFunction} SchemaValidateFunction */
+/** @typedef {import("ajv").AnySchemaObject} AnySchemaObject */
+/** @typedef {import("ajv").ValidateFunction} ValidateFunction */
+
+/**
+ *
+ * @param {Ajv} ajv
+ * @returns {Ajv}
+ */
+function addUndefinedAsNullKeyword(ajv) {
+  ajv.addKeyword({
+    keyword: "undefinedAsNull",
+    before: "enum",
+    modifying: true,
+    /** @type {SchemaValidateFunction} */
+    validate(kwVal, data, metadata, dataCxt) {
+      if (kwVal && dataCxt && metadata && typeof metadata.enum !== "undefined") {
+        const idx = dataCxt.parentDataProperty;
+        if (typeof dataCxt.parentData[idx] === "undefined") {
+          // eslint-disable-next-line no-param-reassign
+          dataCxt.parentData[dataCxt.parentDataProperty] = null;
+        }
+      }
+      return true;
+    }
+  });
+  return ajv;
+}
+var _default = addUndefinedAsNullKeyword;
+exports.default = _default;