check variable name list for uniqueness of name

Author: Imiss-U1025

client/packages/lowcoder/src/comps/editorState.tsx

@@ -493,6 +493,15 @@ export class EditorState {
     if (name !== oldName && this.nameAndExposingInfo().hasOwnProperty(name)) {
       return trans("comp.nameExists", { name: name });
     }
+
+    //Check query variable name duplication
+    const queryComInfoList:string[] = [].concat(...(this.getQueriesComp()
+      .toJsonValue().map((item: any) => item.variables.variables.map((v: any) =>  v.key))));
+    
+    if (name !== oldName && queryComInfoList.includes(name)) {
+      return trans("comp.nameExists", { name: name });
+    }
+
     return "";
   }