清除Telegram Bot中的未决更新数

我创建了一个Telegram Bot并将setwebhook设置为ssl url.我的开发语言是PHP. 在测试期间，一切正常，但是在注册了两个小时或多个小时之后，我在getWebhookInfo上遇到了以下错误

I created a Telegram Bot and setwebhook to a ssl url. My developing language is Php. In testing time, every thing worked fine but after many hours and two or three users have been registered, I got bellow error on getWebhookInfo

{"ok":true,"result":{"url":"https://xx.com/get-text","has_custom_certificate":false,"pending_update_count":111,"last_error_date":1501993548,"last_error_message":"Read timeout expired","max_connections":40}}

我发现无法清除ending_update_count. 之后，我将200状态恢复为Telegram，删除webhook，设置GetUpdate并再次设置webhook但什么都没改变.同样我有111个待处理的更新计数.

I found that pending_update_count could not be cleared. After that I returned 200 status to Telegram , delete webhook , set GetUpdate and again set webhook But nothing changed.Again I have 111 pending update count.

另一方面，我和其他三个用户每两分钟给出一次最后响应.我删除了bot并再次/启动它，但是像以前一样，我每两分钟给出最后一个响应.

On the other side, I and three other users give last response every two minutes. I Delete bot and again /start it but such as before, I give last response every two minutes.

我该如何解决这个问题?

How can I solve this problem ??

谢谢