-- Accepting overlap call from '<CLID>' to '<unspecified>' on channel 0/30, span 2
    -- Starting simple switch on 'Zap/61-1'
    -- Executing Gosub("Zap/61-1", "cidlookup|cidlookup_1|1") in new stack
    -- Executing LookupCIDName("Zap/61-1", "") in new stack
    -- Executing Return("Zap/61-1", "") in new stack
    -- Executing Goto("Zap/61-1", "from-internal|8035") in new stack
    -- Goto (from-internal-fixcid,from-internal,8035)
    -- Hungup 'Zap/61-1'

And I see this in /var/log/asterisk/full:
Mar 22 12:09:28 WARNING[30554] pbx.c: Channel 'Zap/61-1' sent into invalid extension 'from-internal' in context 'from-internal-fixcid', but no invalid handler