How to handle two Redactor fields in one entry page in Craft 3.3?

Question

I have an entry for blogs page. It contains 2 Redactor fields named content and body. I upgraded Craft 2 to Craft 3.3. Then the old editor changed to Redactor plugin, but that Redactor worked for body tag and not working for content tag. When I take an entry with content tag means, getting an error like:

Invalid Configuration – yii\base\InvalidConfigException Redactor plugin not found: 1. in {sitepath}/vendor/craftcms/redactor/src/Field.php

The entry works perfectly for the body tag.

My standard.json is like below:

{
    "buttons": ["html", "format", "bold", "italic", "lists", "link", "file","unorderedlist","orderedlist","image","video","table"],
    "plugins": ["fullscreen"],
    "toolbarFixed": true,
    "script": true,
    "paragraphize": false,
    "replaceDivs": false,
    "linebreaks": true,
    "enterKey": false,
    "replaceTags": false
}

Please help.