[Asterisk-Users] how to delete a key from database in extensions.conf

[Shaun]

I can set a family/key=value just fine, but how can i delete it?

exten => _200,1,AgentCallbackLogin(||${CALLERIDNUM}@default)
exten => 
_200,2,Set(DB(AgentsMAP/${CALLERIDNUM})=${AGENTBYCALLERID_${CALLERIDNUM}})
exten => _200,3,Hangup
exten => _201,1,AgentCallbackLogin(||)
exten => _201,2,Set(DB(AgentsMAP/${CALLERIDNUM})=)
exten => _201,3,Hangup


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~Shaun