idbeta opened a new issue #1175:
URL: https://github.com/apache/apisix-dashboard/issues/1175
# Bug report
## Describe the bug
if there is only one plugin in the plugin list, an error will be prompted
when deleting it.
## How to Reproduce
1. Go to `plugin list` page
2. enable **one** plugin, like "prometheus"
3. deleting it by `Delete` button
4. See error

```
Request URL: http://40.72.102.110:9000/apisix/admin/global_rules/1
Request Method: PUT
Request Body: {"id":"1","plugins":{}}
Response: {"code":10000,"message":"schema validate failed: (root): plugins
is required","data":null,"request_id":"f4a2eaed-3698-44ca-b64c-223239336b8a"}
```
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