mod_callcenter does not remove old configurations

[DavudSafarli]

Examples for reproducing the problem can be found at the links below. Issue is described perfectly in the links. Both questions are still unanswered, and i am facing the exact same problem.

Mod_callcenter reload xml error
mod_callcenter reload configuration (queues / agents / tiers) from xml

I am using mod_callcenter with mod_xml_curl to provide callcenter.conf for each queue by letting xml_curl request for it.
Upon restarting queue with callcenter_config reload queue queue_name@domain xml_curl requests configuration file, but old configurations don't get deleted.

example old config:
<tier agent="1001@default" queue="support@default" level="1" position="1"/>

example new config:
<tier agent="1002@default" queue="support@default" level="1" position="1"/>

running callcenter_config tier list after new configuration:

queue|agent|state|level|position
support@default|1001@default|Ready|1|1
support@default|1002@default|Ready|1|1

[KhuzaimaFarooq]

mod_callcenter only updates the connected database, not XML config files. You need to remove queue configs from XML files manually and then run this...

callcenter_config reload queue queue_name