I have updated and get this

I have updated and get this

retrieve_conf failed, config not applied
Ignore this
Reload failed because retrieve_conf encountered an error: 1
Added 32 seconds ago

retrieve_conf failed to sym link:
/etc/asterisk/sip_notify.conf from core/etc
This can result in FATAL failures to your PBX. If the target file exists and not identical, the symlink will not occur and you should rename the target file to allow the automatic sym link to occur and remove this error, unless this is an intentional customization.

Could you help me???