Fix message validation (#957)

kafka-ui-react-app/src/components/Topics/Topic/SendMessage/validateMessage.ts

@@ -8,14 +8,17 @@ const validateMessage = async (
   setSchemaErrors: React.Dispatch<React.SetStateAction<string[]>>
 ): Promise<boolean> => {
   setSchemaErrors([]);
-  const ajv = new Ajv();
+  const keyAjv = new Ajv();
+  const contentAjv = new Ajv();
   try {
     if (messageSchema) {
       let keyIsValid = false;
       let contentIsValid = false;
 
       try {
-        const validateKey = ajv.compile(JSON.parse(messageSchema.key.schema));
+        const validateKey = keyAjv.compile(
+          JSON.parse(messageSchema.key.schema)
+        );
         keyIsValid = validateKey(JSON.parse(key));
         if (!keyIsValid) {
           const errorString: string[] = [];
@@ -32,7 +35,7 @@ const validateMessage = async (
         setSchemaErrors((e) => [...e, `Key ${err.message}`]);
       }
       try {
-        const validateContent = ajv.compile(
+        const validateContent = contentAjv.compile(
           JSON.parse(messageSchema.value.schema)
         );
         contentIsValid = validateContent(JSON.parse(content));