Unable to register extension, priority 1 in 'default'

can any one help me…

NOTICE[7281] cdr.c: CDR simple logging enabled.
NOTICE[7281] indications.c: Removed default indication country 'us’
ERROR[7281] res_config_pgsql.c: Postgresql RealTime: Failed to connect database server asterisk on 127.0.0.1. Check debug for more info.
WARNING[7281] res_config_pgsql.c: Postgresql RealTime: Couldn’t establish connection. Check debug.
NOTICE[7281] res_odbc.c: Adding ENV var: INFORMIXSERVER=my_special_database
NOTICE[7281] res_odbc.c: Adding ENV var: INFORMIXDIR=/opt/informix
WARNING[7281] res_smdi.c: No SMDI interfaces were specified to listen on, not starting SDMI listener.
WARNING[7281] chan_misdn.c: chan_misdn is not initialized properly, still reloading ?
NOTICE[7281] app_playback.c: Reloading say.conf
WARNING[7281] pbx.c: Unable to register extension ‘6010’, priority 1 in ‘default’, already in use
[Feb 10 12:54:08] NOTICE[7281] pbx_ael.c: Starting AEL load process.
[Feb 10 12:54:08] NOTICE[7281] pbx_ael.c: AEL load process: calculated config file name ‘/etc/asterisk/extensions.ael’.
[Feb 10 12:54:08] NOTICE[7281] pbx_ael.c: AEL load process: parsed config file name ‘/etc/asterisk/extensions.ael’.
NOTICE[7281] pbx_ael.c: AEL load process: checked config file name ‘/etc/asterisk/extensions.ael’.
NOTICE[7281] pbx_ael.c: AEL load process: compiled config file name ‘/etc/asterisk/extensions.ael’.
NOTICE[7281] pbx_ael.c: AEL load process: merged config file name ‘/etc/asterisk/extensions.ael’.
NOTICE[7281] pbx_ael.c: AEL load process: verified config file name ‘/etc/asterisk/extensions.ael’.
WARNING[7281] chan_zap.c: Ignoring switchtype
WARNING[7281] chan_zap.c: Ignoring signalling
WARNING[7281] chan_zap.c: Ignoring trunkname
WARNING[7281] chan_zap.c: Ignoring trunkstyle
WARNING[7281] chan_zap.c: Ignoring hassip
WARNING[7281] chan_zap.c: Ignoring hasiax
WARNING[7281] chan_zap.c: Ignoring hasexten

this is th log that i am getting when i tried to connect asterisk using sip phone

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this has nothing to do with your sip phone, you have 2 extensions configured with the same priority

when you have this in your extensions.conf you see the warning

6010,1
6010,1